If I asked you to name a microbe that's living in your gut, many of you would probably say E. coli. 如果请你举例说出一个生活在你肠道里的微生物，很多人可能会说大肠杆菌。 A lot of people say this. It's the best-known of the gut microbes
What about the other side of this contrast? Sexual orientation. 我们接着谈另一个问题：性的取向。 I have a certain sexual orientation. 我有着某种性取向。 What is that? 它是什么呢？ I'm attracted to people of a particular gender.
