Stand the fish tank on a firm base.
把鱼缸放在牢固的`基座上。
The fish return to the river as adults in order to breed.
这种鱼长成以后回到河中产卵。
This fish has a lot of bones in it.
这种鱼多刺。
How many fish did you catch?
你捕到几条鱼？
The eyes of some fish have a greater sensitivity to light than ours do.
有些鱼的眼睛对光比我们敏感。