当大家碰到难点时可以说 a tough nut to crack 特别难打开的坚果。这个表达也可以用来形容一个很难应对或难理解的人。
例句
My new boss is a tough nut to crack. I never know if hes pleased with my work.
How can we increase sales during a recession1? Thats a tough nut to crack!
请注意
表达 use a sledgehammer to crack a nut 用大锤来敲开一粒小坚果,实质意思是杀鸡用牛刀,小题大做。
The police sent five officers to arrest one teenage thief? Thats really using a sledgehammer to crack a nut!