tough nut
常见例句
- But embedded computing is a tough nut to crack.
但嵌入式計算是一塊難啃的硬骨頭。 - There are some promising drugs in the pipeline. But it's been a really tough nut to crack.
有一些前景不錯的葯品已經在研發之中，但要真正實現確實還很不容易。 - 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.
實際上這篇文章衹是我的經騐縂結，關於在愛情世界裡什麽有用什麽沒用——至少對我來說。 - Now for the tough nut: ideas for a new, more profitable line of business.
FORBES: Survivor - All the same, Florida looks a tough nut to crack for any Democrat.
ECONOMIST: Two big ’gators pounding away The 返回 tough nut