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- 人们专门弄了一个自然对数函数的底数 e，是为什么？ - 知乎
e 的存在，使得 e^{x} 是求导运算的不动点。-----有了数字 e, 并定义了它的指数，对数是指数的反函数。以 e 为底数，我们可以定义对数函数。 \ln (x) PS: 在定义 ln(x) 之前，已经说明了存在某个数字 e, 使得 e ^ x 的导数为自身。
- r Memes the original since 2008 - Reddit
Memes! A way of describing cultural information being shared An element of a culture or system of behavior that may be considered to be passed from one individual to another by nongenetic means, especially imitation
- 知乎 - 有问题，就会有答案
知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视
- Reddit - Dive into anything
Reddit is a network of communities where people can dive into their interests, hobbies and passions There's a community for whatever you're interested in on Reddit
- Am I the Asshole? - Reddit
In your top level comment be sure to include one abbreviation for your judgment, i e YTA = You're the Asshole YWBTA = You Would Be the Asshole NTA = Not the Asshole (and the other person is) YWNBTA = You Would Not be the Asshole (and the other person would) ESH = Everyone Sucks here NAH = No Assholes here INFO = Not Enough Info
- S. T. A. L. K. E. R. - Reddit
All about the S T A L K E R survival-horror computer game series: Shadow of Chernobyl, Clear Sky, Call of Pripyat, community mods for each, and the upcoming official sequel S T A L K E R 2: Heart of Chornobyl This is not a subreddit about stalking people nor discussing real-life stalkers!
- r Italia: lItalia su reddit
Salve ragazzuoli e ragazzuole, sono un ragazzo di 25 anni, attualmente studio all'università e a breve mi laureo, avendo in questo periodo leggermente più tempo ho deciso di iscrivermi in palestra e farmi aiutare da una nutrizionista ed un personal trainer con la speranza di poter migliorare fisicamente, intendiamoci non sono messo così male, sono 182cm x 76kg, ma non sono nemmeno un adone
- Clash Royale: A Most Ridiculous Duel! - Reddit
r ClashRoyale: Subreddit for all things Clash Royale, the free mobile strategy game from Supercell
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