There is this building and it's going to be 15 meters high, and I'm going to throw something and it's going to go up and come down.

这是一栋大楼,它有15米高,我会抛出某个物体,它将先上升后下降

耶鲁公开课 - 基础物理课程节选

Actually, I had to, a lot of the time, I had to walk down the street and go up to people and ask them questions.

实际上，很多时候，我得走上大街，找人问问题。

在超市遇到的人 - SpeakingMax英语口语达人