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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
- One Piece - Reddit
Welcome to r OnePiece, the community for Eiichiro Oda's manga and anime series One Piece From the East Blue to the New World, anything related to the world of One Piece belongs here! If you've just set sail with the Straw Hat Pirates, be wary of spoilers on this subreddit!
- 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!
- Europa Universalis V - Reddit
A place to share content, ask questions and or talk about the yet-to-be-announced grand strategy game Europa Universalis V by Paradox Development Studio Until unless confirmed otherwise, content about Paradox Tinto's upcoming "Project Caesar" game is allowed here
- Counter-Strike - Reddit
r GlobalOffensive is the home for the Counter-Strike community and a hub for the discussion and sharing of content relevant to Counter-Strike: Global Offensive (CS:GO), and Counter-Strike 2 (CS2) Counter-Strike enjoys a thriving esports scene and dedicated competitive playerbase, as well as a robust creative community This is the largest and most active CS sub on Reddit
- Team Fortress 2 - Reddit
r tf2: This subreddit is dedicated to Team Fortress 2, created by Valve Corporation in 2007 After nine years in development, hopefully it was worth…
- Black Women - Reddit
Be respectful It's not hard We don't censor comments but we don't allow disrespect and random trolling If you don't like what you see, don't comment
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