How y'all doing? Good. I came here to give you a science lesson 大家好吗？非常好。今天我想给大家上一堂科学课， about animal mating systems and why defining monogamy has been a challenge for scientists. 关于动物交配体系，以及为什么对科学
White House Christmas Eve, 24 December 2005 Good morning. On this Christmas Eve, Laura and I send our best wishes to families across America as you gather in your homes to celebrate the holiday. Chris
So for any of us in this room today, 今天在座的各位， let's start out by admitting we're lucky. 我们先承认我们是幸运的。 We don't live in the world 我们没有生活在 our mothers lived in, our grandmothers lived in, 我们母
You should be nice to nerds. 你们要对书呆子好点。 In fact, I'd go so far as to say, if you don't already have a nerd in your life, you should get one. 实际上，我想说如果你生活里还没有个书呆子赶紧找一个。 I'm just saying. 我也就
