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      "body": "做父母的真心要时刻关注孩子的小心思，不知道他们什么时候就从小宝宝逐渐长大了。\n\n前几天在和父母视频时，刚好老妈给小外甥女他们炸薯条了，小姑娘吃的很开心。视频这头的儿子只能看着也吃不上。他不在意的玩着自己的，嘴里说着：姐姐，别老吃零食了！ 那头姐姐说，这是姥姥做的，不是买的。儿子说，那也是零食啊，小心长胖！ 大家都哈哈大笑，说这个小家伙吃不到葡萄说葡萄是酸的。\n\n周末在家，我也问儿子想不想吃薯条，我给他做，他挺开心的。第一次尝试，做的也蛮成功，我看着都挺诱人。儿子过来吃了，我又逗他了，好吃吗？你不怕长胖吗？我吃的时候还在给他录视频……结果儿子吃了两三根就不吃了！然后就开始在家跑步运动起来。。。运动完了就去玩他的玩具了！ 我再喊他来吃薯条他都不吭气。\n\n接下来我就给他做晚饭吃了，吃过晚饭，我挨着儿子，悄悄问他，是不是因为妈妈说你吃薯条了，你生气就不吃了。他说嗯…… 然后我给他道歉，说对不起，我不应该笑话你的。儿子委屈的说，你再也不要嘲笑我了。我说好的好的，然后我把薯条拿来给他喂，小朋友吃了一口，脸上乐开了花，一扭一扭，美滋滋的。\n\n那一刻我知道儿子长大了，不能再将他当不懂事的小孩子来逗乐了，要注意他的自尊心。\n\n晚上给儿子洗完澡，他又悄悄的对我说，妈妈，你再也别说我长胖了……\n\n原来，他还在意这个。也许因为全家都在减肥的事。。。。\n\n后来，我和老公，和姐姐悄悄分享了孩子的心理变化，希望我们都能从此把他当一个大人看待。\n\n努力向前吧！ 小伙子\n\n![a5a1cf811c79611c09144b650516435f_Moment (2).jpg](https://cdn.steemitimages.com/DQmYMX24BA6PNLsgarsfv3M98DDxZWWrHPhGfRvhUX8kWPJ/a5a1cf811c79611c09144b650516435f_Moment%20(2).jpg)",
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      "body": "我也是一个开发人员，因为之前的工作面向的不是2C的，所以并没有太多涉及到很细致的用户交互问题，主要关注的还是功能性需求和性能需求。\n\n但是最近的工作涉及到这方面的问题了，比如一个2C的产品，可能会在初期的时候设计的不是那么周全，后期肯定要涉及到页面、模块、功能的调整。这个时候问题就来啦！\n\n你和开发交流，说这个不合适，暂时这么这么改；\n开发说：有必要吗？\n你说：嗯，原来这个确实不合适，新的要设计出来估计也要一个多月，暂时用这个这个方案；\n开发说：那我觉得还不如不换啊，等新的出来再说吧！\n\n嗯，其实呢，换一个只需要几分钟就能解决的，为什么开发不愿意做这个事情呢？\n我觉得是这样的：\n1. 如果是新功能开发，通常都是没有问题的；\n2. 如果是有严重bug要修复，也是没问题的；\n3. 如果是不疼不痒的bug，那就要拖一下，能不做就不做；\n4. 如果是交互性的，提升用户体验的，那必须给出足够的理由；\n\n开发人员最不喜欢的是什么呢？\n最不喜欢的就是不确定的需求，改来改去的；\n不要随时用琐碎的事情打扰到开发，最好整理成一个完成的文档；\n按照需要完善的问题，分周期、分步骤的，具体化到要发布的版本，这样就有明确的目标；\n最最重要的是：这样子大家都有直接的工作报告和KPI好交差了不是？（手动狗头）\n\n=========================\n附上刚刚4岁的小朋友新画作：（是不是该给你发个NFT啊？万一以后就成名了呢🤩）\n\n![image.png](https://cdn.steemitimages.com/DQmNTJtJgyr2HhH95u2w5tS2vZG87B5jcfxPWpED73aGWz5/image.png)",
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      "body": "Git，非常好用的版本管理工具，通常是在码农圈里流行。\n但是现在随着科研的发展，很多研究成果在以论文形式发表时，通常也会将论文中使用的数据或者代码公开，以方便成果复现。大多数就需要用到了Github，这个全球第一的开源代码托管平台（其实不止是这个功能了），它就是基于Git技术搭建的平台。\n\n所以，不会Git，都不好意思做科研了！\n\n但是，据我有限的了解，国内很多做科研的老师是不懂用Git的，所以，提升科研实力从Git开始 :)\n\n不止是代码管理啊，其他专业的比如实验成果记录，过程管理，都可以使用的哇~ \n\n国内有时候访问Github不是太方便，尤其是曾经说要屏蔽中国。。。。\n\n所以大家也可以选择国内的一些git平台，比如码云什么的\n\n做科研的话，也推荐一个比较小众的，git.openi.org.cn， 这个主要是面向AI领域的，里面有专门的数据和模型管理模块，还有免费的算力可以撸……",
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      "body": "# 三百山\n不知道五一去哪儿啊，今天这报复性的五一出游，估计哪儿哪儿都人多吧？\n\n这个景区是同事推荐的，嗯，目前由于交通不是太方便，估计还算比较小众的。\n# 推荐方式：自驾出游\n\n\n这个Steemit目前还不支持视频格式……给大家贴点图吧\n\n# 特色：山景、玻璃栈道、温泉\n\n## 消费水平\n\n估计县城内还好，景区内就贵了，尤其是这个五一\n\n平时300的房间涨到600；\n平时600的涨到1300；\n平时1000多的……我没敢看啊。。。。\n\n\n![image.png](https://cdn.steemitimages.com/DQmUneQKBCnjmFc3Jsb52TWtgECXcWreQhvWRzhzEMc1eY2/image.png)\n\n\n\n![image.png](https://cdn.steemitimages.com/DQmVkQrkUKAwRXaHsD8684uaACmQXq9dpppRQCf94ntXMYu/image.png)",
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      "body": "参考一下DrG科学育儿公众号的一个文章：[全国小孩睡觉磨洋工图鉴](https://mp.weixin.qq.com/s/d1Esaqf1UYgysTcWtnTTtQ)\n\n简直是太真实了\n\n即将4岁的星星的睡觉场景快照：\n![image.png](https://cdn.steemitimages.com/DQmdHKoTB6kpYskCf4SdoSGEB4zTGRwBysCpBk7CyhUgnxY/image.png)\n\n\n星星还可以，不需要挠背按摩这样的操作，哈哈哈\n\n用胳膊扣住简直不能太形象，可惜天热的时候，这招就不太行，没1分钟，娃就挣扎开了：我好热……\n\n然后滚到旁边凉快一点的位置趴着，这个时候，还需要和你有一些接触（这种情况下我绝对相信什么生物电之类的，什么感应之类的）， 我家的接触方式是：你摸着我的屁股……（他是光屁屁睡觉的，需要我一只手放在他的小pp上，虽然摸着光溜溜嫩嫩的小圆pp也是挺舒服的）\n\n下面这个是我小外甥女的图鉴：\n\n![image.png](https://cdn.steemitimages.com/DQmTnu6WDZvNo79CPKBx2YjGHVdi57hnEBhuC3Nh7pTa7oP/image.png)\n\n这孩子的特点就是把亲妈折腾一番后，最后还有一套”找爸爸“……",
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      "body": "大家参与Defi挖矿都是为了有丰厚的回报的，这里讨论的问题不是获得LP Token并且增值的情况。我们讨论的仅仅是提供到流动性池中的代币资产。\n\nAMM池中的流动性提供者LP会面临一些固有风险和效率低下的问题。最重要且相对深奥的风险是无常损失（Impermanent Loss），即在**向AMM池中提供流动性**与**持有基础代币**之间的资产组合价值随时间而形成的差异。\n\n发生这种情况是因为AMM市场价格不会自动调整，因此，当整个市场的价格发生变化时，套利者会介入并以牺牲流动性提供者利益为代价来获利。因此，AMM池中LP的实际收益是**交易累计费用**与**价格差异所造成的无常损失**之间的平衡。\n\n下面这个图（此图非我原创，来源于网络）很好的展示了在当前价格相对于初始价格波动时，无常损失的大小。所以当价格涨到5倍时（500%)，无偿损失为25%。\n\n所以，谁来提供一个避免无偿损失的机制呢？\n\n![image.png](https://cdn.steemitimages.com/DQmZZ83UCNDKyTTc1jytKroPqcJCXDZr98cUaqKbfxttxWS/image.png)",
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      "body": "从3月10日来看btc横盘已有33天，从历史数据分析横盘一个月之久的情况并不多见，尤其是在牛市中后期，经历长时间横盘必然会有一波比较大的行情出现，向上还是向下让我们拭目以待。\n <img src=\"https://cdn.steemitimages.com/DQmQBn71gMpvkGpdkVTHz8UPr1CgSbKWBLniizotBTDcrv7/image.png\" alt=\"drawing\"  align=\"center\" height=\"500\"/>\n\n\n这个月走势最大的风险就是4月份的新月线，月线开盘位置较高，从开盘价到五月均线的价格差达到14487美元，占比开盘价24%，根据以往的经验，都会回踩或者接近5月线的附近位置，btc回调20%并不稀奇，如果能从最高点回调或者扎针到0.618这个黄金位置即38192.4美元，将是一个特别好的入场点，且是本轮牛市最后一个极佳的入场位置。\n\n \n![image.png](https://cdn.steemitimages.com/DQmVyZFE9BYar77WkBiNVnwkLy434s1W7qKG3pwxxy63j6D/image.png)\n\n\n日线和4小时线看btc形成一个29天的三角震荡区间，表面看的是上升三角形，底部再一次次变高，但是量能一直在衰减。\n操作的建议：离变盘的时间越来越近了，快则一周以内慢则月底之前，如已有埋伏的朋友不建议加仓，如果一直空仓的朋友可以考虑开始打底仓。现在需要的是耐心等待趋势明朗，择机满仓进入。\n \n![image.png](https://cdn.steemitimages.com/DQmUYVsjc31tU25cQLxxNMNXSK4QWQbwFnDTkKuxkh8GMEs/image.png)\n\n![image.png](https://cdn.steemitimages.com/DQmTUbbAFgYcPKmpz9zYaqZLEr5LGfZ4ctRmwEi6JRGEpuc/image.png)",
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      "body": "【看到Greek yogurt的时候想到了似乎什么安慕希上面有这个希腊酸奶的字样，于是搜了一下，感觉被骗了。我想尝一下真正的，可以用到切的希腊酸奶~~~国内有吗？】\n\n简单地说，希腊酸奶是将牛奶进行高度浓缩的产物，用特殊的过滤网，把酸奶的水、一部分乳酸、乳糖和乳糖被乳酸菌分解的产物等过滤掉，一般1000克牛奶可以得到300克左右类似固体的希腊酸奶。一般100克牛奶的蛋白质含量是3克左右，浓缩后，蛋白质可达到9克以上，含碳水化合物4.1克，脂肪6克，比普通酸奶要高很多，非常浓稠，可以用刀切。\n\n所以，真正的希腊酸奶非常浓稠，像奶酪一样呈块状型，甚至可以用刀切，因此希腊人食用酸奶时通常使用勺子来“挖”。希腊酸奶的口感醇厚，有点像奶油，也有点像奶酪，酸奶本身没什么甜味，只是奶香中带酸味。曾经品尝过中国酸奶的希腊人克里斯对《环球时报》记者说，对用吸管“喝酸奶”感到非常惊讶，他直言，那并不是自己理解中的酸奶，而更像是酸奶饮料。而市面上一些希腊酸奶的配料表：生牛乳、白砂糖、乳清蛋白粉、食品添加剂、保加利亚乳杆菌、嗜热链球菌。不仅不是产自希腊，其味道和质地同真正的希腊酸奶差很多。\n\n\n![image.png](https://cdn.steemitimages.com/DQmRa8TBkWwfnqGdpKhBU2s9Ta6MjmmgDDxAZY1xHW4fLhR/image.png)",
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      "body": "## 关于微信、支付宝和数字人民币\n央行数字货币研究所所长穆长春：\n```\n“微信、支付宝和数字人民币不是一个维度上的，微信和支付宝是金融基础设施，是钱包；\n数字人民币是支付工具、是钱包的内容”\n二者不存在竞争关系\n```\n\n**【我的解读】**\n- 微信和支付宝其实只是个辅助工具，里面操作的内容其实是人民币； \n- 数字人民币也是一种人民币；也许以后微信里也能接入数字人民币相关的接口，进行支付\n\n\n##  关于中国央行数字货币（DC/EP）、数字人民币（e-CNY）和全球央行数字货币（CBDC）\n\nDC/EP是一个双层的研发与试点计划，可能包含着若干种可以尝试并推广的支付产品，最后命名为e-CNY\n\n\n第一层主体：中央银行\n - 维护数字人民币的币值稳定\n - 建设可靠的结算与清算等基础设施\n - 有责任促进不同支付产品之间的互联互通\n - 在动态演变系统中准备好应急和替代方案\n\n第二层商业机构（商业银行、电信运营商、第三方支付网络平台公司）:\n-   实际上拥有e-CNY的所有权以及可支付的保证，承担KYC、反洗钱、和用户数据隐私保护等一系列合规责任\n\n\nCBDC与之不同的是，将第二次商业机构的责任都归属于央行\n\n**【我的解读】**\n\n这么看，e-CNY有点像各家机构都可以发行你们自己的数字人民币，其实我觉得主要是换了一个方式记账；但是必须在央行的总体管控下，保证币的稳定、风险可控、互相流通。\n\n对比到现在的公链上来看，有主网，有子链，如果子链上的代币是通过比例质押主网币得到的，但是在子链内可以配合其业务场景，进行高效结算、流通，是不是有点类似？",
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      "body": "## 存储空间\n可以看作为一个包含2^256个入口(slot)的array，每个入口是32-byte大小\n\n但是实际存储中，使用的是key-value的形式存储的，这个可以看作为一个稀疏数组：\n\n32-byte keys to 32-byte values\n\n没有数据存储的key，对应的值就是0\n\n因此，当智能合约中，某个key对应的存储从某个值变为0时，就会回收存储空间，这在以太坊智能合约中就对应于一个refund\n\n## 固定大小数据存储\n\n对于固定数据的存储，就是按照顺序分配slot\n\n```\ncontract StorageTest {\n    uint256 a;\n    uint256[2] b;\n\n    struct Entry {\n        uint256 id;\n        uint256 value;\n    }\n    Entry c;\n}\n```\n![image](https://programtheblockchain.com/storage/fixed.png)\n\n## 动态大小数据存储 - 数组/slice\n\n动态大小的数据结构，存储size和数据，其中size按照顺序存储，实际数据则存储在hash(slotNumber)开始的空间\n\n```\ncontract StorageTest {\n    uint256 a;     // slot 0\n    uint256[2] b;  // slots 1-2\n\n    struct Entry {\n        uint256 id;\n        uint256 value;\n    }\n    Entry c;       // slots 3-4\n    Entry[] d;\n}\n```\n接着上一个solidity合约的例子，d 为变长结构，d的数组大小存储在slot 5内，而d的实际内容存储在hash(5)开始的连续空间\n\n![image](https://programtheblockchain.com/storage/dynamic.png)\n\n\n计算函数：\n```\nfunction arrLocation(uint256 slot, uint256 index, uint256 elementSize)\n    public\n    pure\n    returns (uint256)\n{\n    return uint256(keccak256(slot)) + (index * elementSize);\n}\n```\n##  动态大小数据存储 - map\n\nmap需要根据key对数据内容进行快速查找，存储时先对map的size指定一个slot，但是这个slot内并没有实际内容，只是利用slot的编号，去寻址后续map的内容\n**hash(value,slotnumber)**\n```\ncontract StorageTest {\n    uint256 a;     // slot 0\n    uint256[2] b;  // slots 1-2\n\n    struct Entry {\n        uint256 id;\n        uint256 value;\n    }\n    Entry c;       // slots 3-4\n    Entry[] d;     // slot 5 for length, keccak256(5)+ for data\n\n    mapping(uint256 => uint256) e;\n    mapping(uint256 => uint256) f;\n}\n```\n\n![image](https://programtheblockchain.com/storage/mapping.png)\n\n\n计算函数：\n```\nfunction mapLocation(uint256 slot, uint256 key) public pure returns (uint256) {\n    return uint256(keccak256(key, slot));\n}\n```\n\n## 动态大小数据存储 - 复杂结构\n对于比较复杂的结构，主要是分析先取map还是array，然后按照上述的两种计算函数组合即可，arrLocation和mapLocation\n\n## 学习内容来源\n\nhttps://programtheblockchain.com/",
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      "memo": "Dear @avadesian, I had quite a long break from publishing my own articles since I've focused my efforts on building Project.hope community and watching it grow. Today however, I would like to share with you link to my recent publication and I surely hope to read your feedback. All valuable comments will be rewarded with solid upvote. Cheers, Piotr // LINK: https://steemit.com/hive-175254/@crypto.piotr/is-crypto-space-is-mature-enough-for-another-bull-run-i-have-my-concerns",
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      "body": "- 智能合约\n区块链智能合约提供了链上可编程实现的业务逻辑，从以太坊提供了便捷的智能合约编译，大大促进了智能合约的繁荣。尤其是曾经火爆的代币合约，人人皆可发币；造成以太坊严重拥堵的以太猫游戏；现在正在风风火火的Defi合约。\n\n- 公开透明\n\n对于不了解技术的人，听到宣传智能合约”公开透明“，就无条件选择信任，似乎相信既然是公开的，那应该不敢作假吧？总有懂的人看的吧？在一些介绍区块链的书籍或者文章中也是这样说的，比如下面这段：\n![image.png](https://cdn.steemitimages.com/DQmZVvhtF7ZXELxtxwtdtNDH6KXbzd8nzV3LziPxtxw8Xb6/image.png)\n\n- 不公开也不透明的智能合约\n\n对于以太坊上的智能合约，其实上链的内容是以太坊里面EVM虚拟机能够理解的字节码，说白了就是机器能知道要做什么的指令，比如这样的\n```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```\n链上能直接获取到的就是这样的，它不是人能直接看懂的，你说合约透明，确实透明，谁都能看到，可是看到了没用啊……\n\n其实字节码是通过编译器获得的，人们容易看懂的是通过编程语言（比如solidity语言）书写的代码，像下面这样的：\n```\npragma solidity ^0.4.24;\n\ncontract SimpleStorage {\n    uint storedData;\n\n    function set(uint x) public {\n        storedData = x;\n    }\n\n    function get() public view returns (uint) {\n        return storedData;\n    }\n}\n```\n这一小段代码其实就是上面那段看不懂的字节码的solidity源代码，看这个我们可以明白这是一个简单的存储合约，里面有两个方法``set``和``get``。\n\n- 合约透明化\n那怎么样才是正确的合约透明化呢？这就需要发布合约的人公开并验证合约源代码。\n以太坊的区块浏览器etherscan.io上提供了这一功能：\n\n![image.png](https://cdn.steemitimages.com/DQmfVYon6XBAxgT1N6bTW3fZYwWrKGnvrvUSfdCHYvQ3bVt/image.png)\n\n这就是让部署合约的人验证其合约源代码，证明提交到链上的合约内容就是依据该源码编译得到的。\n所以，当你看到什么新项目，什么代币合约，什么Defi合约，不妨都先看看这些合约是否公布了源代码，源码内容是否与其说的一致，避免掉坑里！\n\n\n![image.png](https://cdn.steemitimages.com/DQmVyVmQubCHDpjzNzWBvpVAX6f497FW4LNckiQ829iGMMW/image.png)\n\n\n和我探讨区块链技术内容，欢迎加我微信\n\n![image.png](https://cdn.steemitimages.com/DQmTpDduZjR22vkeTo8ke39xcjTTwzPpeVChDNo5uizViNg/image.png)\n\n发文时比特币价格：11609.17 USDT",
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      "body": "- 缘由\n现在区块链挺火的，也有不少的人开发个人IP，撰写区块链技术文章，甚至写书。\n作为一个技术线的人，为了避免大家对一些底层概念理解错误，也为了增强自己的理解，我会对阅读过程中遇到的一些有问题的表述进行阐述。\n\n- 先看一下下面这段关于区块链挖矿节点工作的表述：\n![image.png](https://cdn.steemitimages.com/DQmat7Ds1bSFY27meSf5U7a59dEw6krigcV48giQuMpfWvG/image.png)\n\n从这个表述中，第四步写的是选择区块链，并阐述“这时候选择工作量最大的链”\n这样会让人误解是先挖出区块后，再选择链；这其实是错误的。\n实际上，第四步应该是挖矿节点的第一步，节点首先是从网络中同步数据，此时对历史区块做校验，并选择工作量最大的链，然后基于选择的链，完成当前区块内交易验证，打包，并将生成的新区块追加到最长链。\n\n**注意：这里的区别是先选择最长链，然后生成区块；而不是先生成区块，再选择最长链追加。**",
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      "body": "This one is finished with my nephew Tongtong, who is only 7 years old.\nHe shared this to his good friend and it seemed he was very proud of this work :)\n\n![](https://cdn.steemitimages.com/DQmYZeyhDqJSQR2vbKjPKJ2bcycBtuqryZh4KGRgUzzu3Ya/image.png)",
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      "body": "Congratulations @avadesian! You received a personal award!\n\n<table><tr><td>https://steemitimages.com/70x70/http://steemitboard.com/@avadesian/birthday1.png</td><td>Happy Birthday! - You are on the Steem blockchain for 1 year!</td></tr></table>\n\n<sub>_You can view [your badges on your Steem Board](https://steemitboard.com/@avadesian) and compare to others on the [Steem Ranking](https://steemitboard.com/ranking/index.php?name=avadesian)_</sub>\n\n\n**Do not miss the last post from @steemitboard:**\n<table><tr><td><a href=\"https://steemit.com/steemfest/@steemitboard/steemfest-meet-the-steemians-contest\"><img src=\"https://steemitimages.com/64x128/https://cdn.steemitimages.com/DQmasWw4jQHwxng82DKxY6Q6tVg9mWcto4xcDURs8knFgCa/image.png\"></a></td><td><a href=\"https://steemit.com/steemfest/@steemitboard/steemfest-meet-the-steemians-contest\">SteemFest⁴  - Meet the Steemians Contest</a></td></tr></table>\n\n###### [Vote for @Steemitboard as a witness](https://v2.steemconnect.com/sign/account-witness-vote?witness=steemitboard&approve=1) to get one more award and increased upvotes!",
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