weir
n.（名词）A fence or wattle placed in a stream to catch or retain fish.鱼梁：在河流中用来捕获或拦截鱼的栅栏或枝条篱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
来源：Middle English were 中古英语 were from Old English wer * see wer- 4源自 古英语 wer *参见 wer- 4
