It is not something dammed up for which a better outlet must be found, but something missing either now, or perhaps for almost the whole of the patient's life.

这些东西不是为了阻塞，这是为了找到一个更好的出路，但是有些东西现在要么找不到了，要么几乎成为了病人的生命的全部。

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Several fallen trees and other debris had dammed up the water, and the fast flow during the floods had excavated the soft earth, leaving behind a fairly deep pool beneath the trees.

几棵落木和其他垃圾堆积在一起形成了一个小水坝。河水泛滥时湍急的水流把松软的泥土都冲走了，在树林后面留下一个有点深的水塘。

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The stream was dammed up to form ornamental lakes.

溪流用水坝拦挡起来，形成了装饰性的湖泊。

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