The reason for that is because all of this is connected, so we're moving electrons everywhere in the system.

这个现象的原因是因为,它们全部都是连接起来的，所以在这个系统中,电子移动到所有地方。

麻省理工公开课 - 化学原理课程节选

you don't know all these things. You don't know the history and you don't know the reasons.

你不知道全部的事情。你不知道那些历史，也不知道原因。

美国的博物馆教育 - SpeakingMax英语口语达人

But, as I mentioned briefly in the last class, the notorious difficulties attending this poem seem to have very little to do with Milton's grief over the death of Edward King, which may well not have been all that troubled or complicated.

不过，正如我上节课简要提到的,这首诗的阅读障碍和弥尔顿对爱德华金之死的,悲啜之情并无太大关系，他的哀悼也不是使这首诗艰深复杂的全部原因。

耶鲁公开课 - 弥尔顿课程节选

One of the things about these plasmids that makes them very useful is that their entire base pair sequences is known.

质粒之所以有用,其中一个原因就是,它的全部碱基序列都是已知的

耶鲁公开课 - 生物医学工程探索课程节选