我从不知道我是什么时候开始张大的！

I don't know what to be when I grow up!

youdao

我从不知道我的老板是否满意我的工作——他从不露声色。

I never know whether my boss likes my work or not — he is a real poker face.

youdao

我的动作显得笨拙，我感到人们在评判我，我从不知道我的手臂该怎么做。

My movements feel awkward. I feel like people are judging me. I never know what to do with my arms.

youdao

Didn't I know anything about turn about to right, but now I think I know enough to amuse them and to entertain them.

我从前从不知道这些东西，但现在我已经学的足够多,足够引起他们的兴趣了。

麻省理工公开课 - 媒体、教育、市场课程节选