"in the sack" in Chinese (Simplified)
在床上性方面（口语）
Definition
'In the sack' 是一个非正式表达，通常指在床上，尤其指睡觉或更常见地指性生活。
Usage Notes (Chinese (Simplified))
非常口语化，常指性生活，有时仅指睡觉。仅用于随便的对话或非正式文字，在正式场合避免使用。
Examples
He is already in the sack because he was tired.
他已经**在床上**了，因为太累了。
Are you still in the sack? It's almost noon!
你还**在床上**吗？都快中午了！
They spent the whole morning in the sack.
他们整个早上都**在床上**。
Rumor has it he's amazing in the sack.
听说他在**床上**非常棒。
I love a lazy Sunday just chilling in the sack.
我喜欢在周日懒洋洋地**躺在床上**轻松一下。
They seemed to get along well, both outside and in the sack.
他们无论在外面还是**在床上**都很合得来。