那么如果我不知道我自己的原因或者任务呢？

What about if I don't know my reasons or duties?

youdao

如果我不知道你的名字，告诉我你是怎样联系到我的。

If I don't know you by name, tell me how you came to contact me.

youdao

如果我不知道如何完成某事，那就索性不要开始做这件事？

I cannot start something if I do not know exactly how to finish it.

youdao

Does anyone have that in their brain somewhere for ready use? I don't, in fact, so it's actually okay if you don't know all your common ions, if you missed that part.

你们有谁有印象它们有什么用吗？,我当时是不知道，所以如果你们不记得,这部分也没有关系。

麻省理工公开课 - 化学原理课程节选

They really don't.So, if everybody masters the material A I can say A's on the house.

他们真的不知道，如果每个人都掌握了知识,那么我敢说，人人可得。

麻省理工公开课 - 固态化学导论课程节选

I don't know. If you've ever seen a movie - well, there are lots of movies that do this; one of the first movies that did this was "Who Killed Roger Rabbit?"

我不知道，如果你们看过那部电影,当然，有很多电影都描写过这一点，其中一部较早的,电影表现了这一手法--《谁谋杀了兔子罗杰》

耶鲁公开课 - 弥尔顿课程节选