fusula

例句：

1. 1.The engineer designed a fusula to improve water flow.
   工程师设计了一个船闸来改善水流。
2. 2.The construction of the fusula was completed in two years.
   建造船闸用了两年时间。
3. 3. The fusula is essential for navigation and transportation.
   船闸对于航行和运输至关重要。