• This is a tough nut to crack. It's going to take some time to figure out.

    件棘手时间才能出来。

    youdao

  • My new boss is a tough nut to crack. I never know if he's pleased with my work.

    老板是个很难相处的人。永远也不知道是否对我的工作满意

    youdao

  • There are some promising drugs in the pipeline. But it's been a really tough nut to crack.

    一些前景不错药品已经研发之中真正实现确实还很不容易

    youdao

  • There are some promising drugs in the pipeline. But it's been a really tough nut to crack.

    一些前景不错药品已经研发之中真正实现确实还很不容易

    youdao

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