There are about 30 000 species of fish in the world.
世界上约有3万种鱼。
Fishing is good at high water.
高水位有利于钓鱼。
How can you tell what sex a fish is?
你怎样辨别一条鱼的雌雄？
I don't like fish.
我不喜欢鱼。
You need a licence to fish in this river.
你在这条河里钓鱼要有许可证。
