这里记录了一些我觉得很有意思的网站，文章或者问答。

俗话说，三分练，七分吃。各位健身党时常需要调整饮食结构来适应不同阶段的目标，以更好地增肌或者减脂。生酮饮食和间歇性禁食作为近年来的两大热门饮食方式，受到了不少健身党的追捧。但是这两者长期以来难分高下，然而近期的一些研究给我们带来了不一样的答案……

时间一直以来都是一个很有意思的概念，先贤们也对此争论不休。当然，时间也在方方面面影响着人们的生活。自古就有“日出而作，日落而息”的说法。虽然来到近代，我们已经（很大程度上）脱离了日晷，摆钟，石英钟和电子表，逐渐习惯了智能手机和智能手表。我们仅需要连接网络，智能设备就可以自动设定当前的时间。而这背后，少不了一个叫做“原子钟”（Atomic clock）的设备。

原子钟可以以惊人的精度来测量时间。以1999年的数据为例，原子钟在600万年内的误差还不到一秒。而最近，一项新技术使得原子钟的精度更上一层楼。

A recent study shows that vaccines are not able to keep you safe from different variants of COVID.

知乎上看到一个问题“30年的房贷利息几乎等于本金，你是怎么看的？”。虽然我们都知道因为通膨，问题并不能如此简单粗暴地看待，不过这里最高赞的回答还是深入浅出，所以在此系统地整理了一下。

Recently, I didn’t update my notes as frequently as before. One of the reasons is that I’m very busy with my work since I’m about to start my intern. Another important reason is that I’ve been spending lots of time in taking courses with free certificates on Coursera. As one of the biggest MOOC, Coursera offers many free courses covering a variety of subjects. However, free audit options cannot earn us a certificate even if you follow the instruction and complete all required assignment. If you want the certificate as a proof of your hard work, you have to pay another 50 bucks (the fees vary depending on the course). Now, due to the pandemic situation, more and more people are forced to study and work from home. Coursera also offers free certificate for over 100 courses.

A full list of these coursers can be found here. You may register these courses for free until 7/31/2020.

Happy learning and stay healthy!

最近听说很火的罗翔老师也入住B站了，开了账号罗翔说刑法。于是火速前去围观，顺便做了点学习笔记。

Today is a special day called “palindromic day”, as you may have seen in the news. A palindromic day is a day, whose date, when written in certain forms, is a palindromic number.

最近发现了一个非常有意思的比赛叫做Agar Art Contest。大概意思就是说在培养皿中生长微生物来“作画”。其中有一些作品非常美（我直接画都画不出- -），尤其是18年的第一名，如下图：

这里记录了一些我觉得很有意思的网站，文章或者问答（最后更新于 2020/20/19）。