Gill

例句：

1. 1. The fish swims with its gills closed.
   这条鱼用鳃呼吸。
2. 2. The fish was swimming in the river with its gills open.
   这条鱼在河里游动时张开了鳃。
3. 3. The fish is a good example of how animals use their gills to breathe.
   这条鱼是一个很好的例子，展示了动物如何使用鳃来呼吸。