干草一旦被割下来打成捆，必须经过一些化学处理。

Once hay has been cut and baled, it has to go through some chemical processes.

《柯林斯英汉双解大词典》

如果你从海上去伦敦，塔桥是你必须经过的第一座桥。

Tower Bridge is the first bridge you have to pass if you go to London from the sea.

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那不是总统的命令所能做到的最好的事情，但必须经过仔细考虑。

That is something not best done by presidential fiat, but only after careful consideration.

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So even though we're not literally throwing RAM away, we're not physically moving anything, conceptually, we have to go through memory in this order back to back to back and then undo it.

即使我们没有把内存依次扔掉，我们物理上没有移动任何东西，概念地，我们必须按照顺序经过内存,回到这里然后撤销它。

哈佛公开课 - 计算机科学课程节选

Their descendants will take possession of it, but only after tremendous struggle.

他们的后代将会占有它，但必须经过激烈的斗争。

耶鲁公开课 - 旧约导论课程节选