;A dam placed across a river or canal to raise or divert the water, as for a millrace, or to regulate or measure the flow.
堰，拦河坝，挡流坝横截河流或运河以提高水位或使河水转向的坝，如用于推动水车，调节或测量水流
A dam placed across a river or canal to raise or divert the water, as for a millrace, or to regulate or measure the flow.
堰，拦河坝，挡流坝横截河流或运河以提高水位或使河水转向的坝，如用于推动水车，调节或测量水流
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