weir
n
1 wall or barrier built across a river in order to control or divert the flow of water 堰; 拦河坝.
2 fence made of stakes or branches put across a stream in order to make a pool where fish may be caught 鱼簖.
🗣️ 情景例句
It's no use crying over spilt milk. What's done cannot be undone.
覆水难收。
It is one thing to speak much and another to speak pertinently.