若无其事

dà jiā dōu jí zhe děng nǐ bāng máng nǐ zěn me hái ruò wú qí shì

大家都急着等你帮忙，你怎么还若无其事？

How can you remain indifferent when your help is urgently needed?

tā men tán qǐ le nán nǚ zhī jiān de shì dàn tā ruò wú qí shì lián yǎn jing dōu bù zhǎ yī xià

他们谈起了男女之间的事，但她若无其事，连眼睛都不眨一下。

They started talking about sex, but she didn’t bat an eyelid.

zhè shì yī gè hěn gān gà de jú miàn dàn shì tā men yìng fù de ruò wú qí shì

这是一个很尴尬的局面，但是他们应付得若无其事。

It was an embarrassing situation, but they carried it off well.