我经常和我的朋友打乒乓球。

I often play ping-pong with my friends.

youdao

我拿起球便能和我的队员们玩起来。

I take the ball and I play with my team.

youdao

我经常在周末和我的朋友打乒乓球。

I often play table tennis with my friends on weekends.

youdao

I would expect, whether you're a Red Sox fan or not, you to be able to look at a list of different pitchers and their average velocity for their fastball, and tell me who has the longest or the shortest wavelength.

无论你是否是一个红袜队球迷，我预想你会看到一系列,不同的投手和他们,投出快球的平均速度，告诉我谁有最长的,或者最短的波长。

麻省理工公开课 - 化学原理课程节选