big deal

英 [bɪɡ diːl]

美 [bɪɡ diːl]

conv. 有什么了不起
n. 大事; 要事

Collins.1

柯林斯词典

N-SING 大事；要事
If you say that something is abig deal, you mean that it is important or significant in some way.
1. I felt the pressure on me, winning was such a big deal for the whole family...
  我感觉到了压力，取胜对全家来说是如此重要。
2. It's no big deal.
  这没什么大不了的。
PHRASE 对…大惊小怪（或小题大做）
If someonemakes a big deal out ofsomething, they make a fuss about it or treat it as if it were very important.
1. The Joneses make a big deal out of being 'different'.
  爱攀比的邻居们很是把“与众不同”当回事。
CONVENTION 有什么了不起
You can say 'big deal' to someone to show that you are not impressed by something that they consider important or impressive.
1. 'You'll miss The Brady Bunch.'—'Big deal.'
  “你会错过《布雷迪一家》的。”——“那有什么了不起。”

noun

anything of great importance or consequence
an important influential person
1. he thinks he's a big shot
2. she's a big deal in local politics
3. the Qaeda commander is a very big fish
Synonym:big shotbig gunbig wheelbig cheesebig enchiladabig fishhead honcho

All of this begs the question, what's the big deal?
所有这一切都回避了这个问题，有什么大不了的？
But in the end, getting rejected will just make you realize that it's not a big deal.
但最终这会让你意识到，被拒绝没什么大不了的。
It's no big deal.
这没什么大不了的。
You just saw me buy a stock. No big deal.
你刚看到了，我买了只股票，没什么大不了的。
So it's not such a big deal, is it?
所以这问题也不大，对吗？
He's right. it's no big deal.
他说的对，没什么大不了的。
I guess sex is just no big deal.
我想性不是一个大问题。
No big deal, we don't need him.
没什么大不了的，我们不需要他了。
Then suddenly it's a big deal.
突然间这就成了件大事了。
You're making a big deal about telling me he proposed.
你郑重其事的告诉我他向你求婚了。