That's very adult of you.

That's very adult of you. 你真懂事。

電影 The War With Grandpa, 2020 #阿公當家 精彩例句:
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Don't you want it?
你不想要嗎?

I think you need that more. You can call it a loan.
我想你會更需要它。就當我借貸給你的。

That's very adult of you, sweetheart.
親愛的, 妳真是個小大人(懂事)。
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