硬骨头

tā zhēn shi gè yìng gǔ tou

他真是个硬骨头。

He is really an indomitable man.

hái shi ràng wǒ de lǎo bǎn lái kěn zhè kuài yìng gǔ tou ba

还是让我的老板来啃这块硬骨头吧。

I'll let my boss crack this hard nut.

wǒ men yī dìng yào bǎ zhè cì de yìng gǔ tou jiě jué diào

我们一定要把这次的硬骨头解决掉。

We must solve this difficult problem.