hard/tough nut to crack

sthdifficult to understand or to do 难事;棘手的问题

The girl found the algebra lesson was a hard nut to crack.这女孩发现代数课难以应付。

Dealing with that problem was a hard nut to crackyou must have worked hard to solve it.处理那个问题很难,你一定花了很大的气力。

hard putto it

in a difficult positionfaced with difficulty面临困境;为难

The little girl found herself hard to put to it to find the way home.这小女孩发现她认不得回家的路了。

We were hard put to it to solve this problembut we succeeded at last.我们起先对解决这个问题感到很为难,但最终还是圆满解决了。

 


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