经过长时间的包围，这座孤城被迫投降。

After a long siege, the town was forced to yield.

《牛津词典》

经过长时间辩论，国会通过了这项提议。

After a long debate, Congress approved the proposal.

《牛津词典》

经过长时间的运动，蒂娜比以前瘦了。

After doing sports for a long time, Tina is thinner than before.

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Followed by a long history of inferior schools and segregation, and also expectation, continued disparity in terms of school and education, which comes to another question.

经过了长时间的,低等教育和种族隔离，以及学校及教育上,长期的歧视和不平等，这就牵扯到了另一个问题。

麻省理工公开课 - 媒体、教育、市场课程节选

Here is the pitch in--of--a string an octave higher so you can see it this way. As you probably know, if you take a long string and pluck it, it's going to take that long string a long time to pass that sort of cycle, if you will, just one pass through that cycle.

这也是个音高,一个高八度的音弦,你可以这样这样看 你们可能知道,如果你拨动长弦,长弦要经过很长时间,才能完成一个震动周期,如果你想,可以尝试下

耶鲁公开课 - 聆听音乐课程节选