"坝"是个多义词，它可以指坝（汉字解释）,坝（建筑名称）。
充气坝改善送水能力。
如果墙和坝之间的距离比波长大，那么会导致什么？
If the distance between the wall and the dam was large in comparison to the wavelength, then what happens?
湖越来越大，以至于冲破了石坝，引发了一场山洪。
The lake grew so huge that it broke the rock dam, releasing a flash flood.
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