We are able to talk about the fact that two plus one equals three, but it's not as though we ever come across numbers-- number three itself--anywhere in the empirical world.

我们可与去探讨,二加一等于三的这个事实,但是我们不可能有一天真的碰到数字,在现实世界中碰到个叫"数字三"的东西

耶鲁公开课 - 死亡课程节选

Well, I'm a sophomore, so I don't really know.

嗯，我二年级，所以我真的不清楚。

来自西班牙的留学生 - SpeakingMax英语口语达人