a big fish
An important, successful, or influential person.
重要人物
Before Donald Trump ran for president, he was already a big fish.
川普在競(jìng)選總統(tǒng)前就是個(gè)很成功的人了。

cold fish
Someone who shows no emotion and comes across as unfriendly or disinterested.
態(tài)度冷漠的人
I like her, but she is a bit of a cold fish.
我還挺喜歡她，但是她好像有點(diǎn)冷誒。
Sunny is not a cold fish at all.
Sunny 可不是個(gè)冷漠的人呢！

an odd fish／a queer fish
Someone who is very strange.
奇怪的人（queer這個(gè)單詞可以指同性戀，所以不要用在不熟的人身上。）
I don't want to invite Jack to the party, he is an odd fish.
俺不想邀請(qǐng)強(qiáng)子來俺的派對(duì)，他很奇怪誒！

bigger / better fish to fry
More important matters to deal with.
有更重要的事要做
I can't worry about that now, I've got bigger fish to fry!
我現(xiàn)在可沒功夫管那個(gè)，我忙著呢！
I want Chris to help me with this project, but he claims he has bigger fish to fry right now.
我想要Chris來幫我做這個(gè)項(xiàng)目，但是他聲稱自己很忙。

not the only fish in the sea / there are plenty of (other) fish in the sea
Plenty of other suitable persons, especially for a romantic relationship.
形容在戀愛關(guān)系中，某個(gè)人并不是世上僅有的。
When Bob walked out on Sally, all we could tell her was that he was not the only fish in the sea .
當(dāng)bob離開sally時(shí)，我們只能告訴她這世界上還有很多好男人。
I know you are broken up about Janet leaving you, but there are plenty of fish in the sea.
我知道你因?yàn)镴anet離開你很傷心，但是還有很多很棒的人啊！

like shooting fish in a barrel
ridiculously easy.
甕中捉鱉，易如反掌。
Eating four burgers is like shooting fish in a barrel for Jack.
對(duì)強(qiáng)子來說，吃四個(gè)漢堡真的太easy了。
For Sunny, Playing mahjong and winning money at mahjong is like shooting fish in a barrel.
對(duì)Sunny來說，打麻將贏錢太簡(jiǎn)單了！