The problem of hunger worldwide is a hard nut to crack. I'm afraid that scientists need to put in more efforts.
全球性的饥饿问题是个棘手的问题，恐怕科学家们需要付出更多的努力。
Sometimes, it is a hard nut to crack without an expert's help.
有时候，如果没有专家的帮助，这是一件很难解决的事情。
Building such a bridge over the bay was a hard nut to crack but the local government made it within two years.
在海湾上建造这样一座桥是一件困难的事情，但当地政府在两年内完成了。
They'll crack them, and then they'll put them into a brine solution to salt-roast them in the shell as the nut is heated," Hudson says, "kind of a lot like salt-roasting in-the-shell peanuts."
他们把壳敲裂，然后放到盐水里，带壳将果核烤热，就像盐烤带壳花生一样。
There are some promising drugs in the pipeline. But it's been a really tough nut to crack.
有一些前景不错的药品已经在研发之中，但要真正实现确实还很不容易。
But embedded computing is a tough nut to crack.
但嵌入式计算是一块难啃的硬骨头。
The hardest nut to crack is high schools - we don't have a strong sense yet how to rescue them.
这其中最难处理的是高中，我们没有坚定的信心找到拯救他们的方法。
T. rex was unlikely to have been a herbivore. But which animals the tyrant lizard actually ate is a far harder nut to crack.
霸王龙不太可能是草食动物，但是这个蜥蜴之王到底吃那种动物却是个更难解的谜。
一种难以寻找而且难以对付的坚果。
My manager is a hard nut to crack. He always shouts at me about what I have done.
经理是个很难对付的人，他总是对我做的事大吼大叫。
他是一个难对付的家伙。
The question of world hunger is a very hard nut to crack . I doubt if we'll find the answer to it in my lifetime.
世界性的饥饿问题是个极其难以解决的问题，我恐怕人们在我这一辈子都找不出解决的办法。
You are not a very easy nut to crack.
你可不是一粒容易打开的核桃。
My new boss is a tough nut to crack. I never know if he's pleased with my work.
我的新老板是个很难相处的人。我永远也不知道他是否对我的工作满意。
Benjamin: The boss is a hard nut to crack. He always shouts at me for trivial things.
本杰明：老板是个狠角色。他经常因为一点小事儿对我大吼大叫。
Sudan was a hard nut to crack.
苏丹真的是难啃的骨头。
Give examples to say, if you want to have a chat boxing match or mathematics hard nut to crack with me, that just like in play piano the cow.
举例来说，如果你想和我聊聊拳击比赛或是数学难题，那无异于对牛弹琴。
This is a tough nut to crack. It's going to take some time to figure out.
这是一件棘手的事。要花些时间才能想出来。
Sunday's match will be a tough nut to crack.
周日的比赛将是场硬仗。
The project of a bank office building in a special urban environment provides a hard nut to crack but also a chance to challenge a new form.
一幢在特定都市环境中的银行大楼设计，给设计者提出了苛刻的设计条件，同时也提供了创造新形式的机遇。
Employee turnover is a hard nut to crack for human resource management.
雇员离职是人力资源管理面临的一个棘手问题。
In English skill training for listening, speaking, reading and writing, listening takes an important position, yet it is also a hard nut to crack in English language learning.
在英语“听、说、读、写”技能训练中，听占有重要的地位，但这也是在英语学习中不易突破的一个难关。
Jeff: This is indeed a hard nut to crack.
杰夫：这实在是一个棘手的问题。
I never know Bill very well. He was not very communicative and always seemed to me a hard nut to crack.
我从来就不太了解比尔，他不太爱说话，我总觉得他这个人很难对付。
The project of an industrial center for teaching located on a special site, provides us a hard nut to crack but also a chance to challenge a new height.
一座选址于特殊地形的教育工业中心，给建筑师出了一道难题，同时也提供了挑战新高度的机会。
But I don't like her boyfriend, Jack. He's a hard nut to crack.
但是我不喜欢她的男朋友，杰克。他是个难对付的人。
But I don't like her boyfriend, Jack. He's a hard nut to crack.
但是我不喜欢她的男朋友，杰克。他是个难对付的人。
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