tough nut to crack

基本解釋

eg: It is a tough nut for him to crack.
這對(duì)他而言是一個(gè)難題。
My new boss is a tough nut to crack. I never know if he's pleased with my work.
我的新老板是個(gè)很難相處的人。我永遠(yuǎn)也不知道他是否對(duì)我的工作滿(mǎn)意。
So I think Iran is always going to be a tough nut to crack, but I think it is worth a try.
另外，他們剛剛發(fā)射了第一顆衛(wèi)星。因此我認(rèn)為，伊朗和以前一樣，還是一顆硬釘子，不過(guò)值得去努力。

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