gill reducer

例句：

1. 1. The gill reducer was designed to improve water flow through the fish's gills.
   鱼鳃调节器被设计用来改善鱼类通过鳃的水流。
2. 2. The gill reducer is a crucial component in maintaining the fish's health and well-being.
   鱼鳃调节器是维护鱼类健康和福祉的关键组成部分。
3. 3. In some species, the gill reducer can be used as a tool for controlling predation by predatory fish.
   在某些物种中，鱼鳃调节器可以被用作控制捕食性鱼类捕食的工具。