如果这句话是真的，我不知晓这会是件好事还是件坏事。

And if they were true, I didn't know if it would be a good thing or bad.

youdao

如果这句话没有使你生气，那么你就是保持了良好的状态。

If the sentence did not piss you off, then you are in good shape.

youdao

如果这句话是无意义的，那么很难说它到底是对的还是错的。

And ifthe sentence were meaningless it’s hard to see how it could be true—which itclearly is.

youdao

And if you remember this phrase, I don't know why you would, but this will help you learn the lanthanides in order.

如果你能记得这句话的话，我不管你们是怎么做到的，但是这个确实会帮助你按顺序记住镧系元素。

麻省理工公开课 - 固态化学导论课程节选