何须

zhè shì de xiáng qíng tā men dōu zhī dào le hé xū zài shuō

这事的详情他们都知道了，何须再说。

They know all the details of this matter, so there's no need to repeat them.

nǐ dǎ gè diàn huà jiù xíng le hé xū xiě xìn

你打个电话就行了，何须写信。

You don't need to write a letter. Just give us a call.

cóng zhè lǐ zǒu dào chē zhàn hé xū bàn gè xiǎo shí

从这里走到车站，何须半个小时？

How does one need half an hour to walk from here to the station?

jiù yī kuài qián hé xū jīn jīn jì jiào

就一块钱，何须斤斤计较。

It's only one yuan, so there's no need to haggle.