needle weir

例句：

1. 1. The needle weiris a natural barrier that separates thetwo rivers.
   针鼻桥是一个自然屏障，将两条河流分隔开来。
2. 2. Thefishermen used to use the needleweir to catch their fish.
   渔民过去使用针鼻桥来捕捉他们的鱼。
3. 3.The needle weir was built to preventfloodwaters from flowing into the city.
   针鼻桥被建造用来防止洪水流入城市。