“这没什么”英语怎么讲

我知道两种说法：1,It' nothing serious. 2，It's a piece of cake.

It's nothing!
It's nothing serious!
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It's no big deal!（没什么了不起）

it doesn't matter.

这里没什么 nothing here
这没什么 that's OK

It's nothing
No big
Piece of cake
Never mind
看你要表现的是什么程度和对什么人说了