俗话说“条条大路通罗马”，背诵
a big fish in a small pond
someone who is important or powerful only because there are not many other people competing with them
(小圈子里的)大人物，小池塘中的大鱼
a cold fish
someone who is not friendly
冷漠无情的人
drink like a fish
To drink a lot of alcohol regularly
(习惯性)饮酒过度，酗酒
a fish out of water
Someone who is in a situation that they know nothing about or are not used to
在陌生环境不得其所的人
have bigger/other fish to fry
to have more important things to do or think about
还有更重要的事情要做
neither fish nor fowl
used for saying that you do not know what something is
非驴非马;不伦不类
There are plenty more fish in the sea.
Used for telling someone whose boyfriend or girlfriend has left them that they will soon have another relationship.
天涯何处无芳草