a tough nut to crack

常见例句

My new boss is a tough nut to crack. I never know if he's pleased with my work.
我的新老板是个很难相处的人。我永远也不知道他是否对我的工作满意。
The cultural connotation and wide-usage of idioms in the literary works have made their translation a tough nut to crack.
习语有着丰富的文化内涵，在文学作品中应用广泛。
Actually, this article is a compilation of my experience of what works and what doesn't work in the world of love, at least for me. Love is a tough nut to crack.
实际上这篇文章只是我的经验总结，关于在爱情世界里什么有用什么没用——至少对我来说。

All the same, Florida looks a tough nut to crack for any Democrat.
ECONOMIST: Two big ’gators pounding away The
Although it is a tough nut to crack, Pakistan is poor because the military is rich and in power and until that changes it is pointless to expect better days.
ECONOMIST: Mulling Musharraf