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。
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。
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。
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。
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。
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。
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。
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。
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。
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。
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。
How safety, develop efficiently the petroleum resources is a hard nut to crack to put in the petroleum industry in front.
如何安全、高效地开发石油资源是摆在石油工业面前的一道难题。
Negative ambiguity, which is a hard nut to crack in language teaching and learning, has long been interested by language researchers.
否定歧义句是历来众多研究者所关注的一个问题，也是英语学习和教育中常遇到的一个棘手的问题。
How to evaluate the value of the software product is a hard nut to crack for software product designer and user.
如何评价软件产品的价值是困扰软件开发商和用户的一个难题。
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。
As we all know, Our boss is a hard nut to crack, every time we want to ask for a leave, he simply says no, whatever reason you might have.
众所周知，我们的老板是个难缠的人。我们每次想请假，他都说不行，不管你有什么理由。
And he took the stones, but nimbly put a nut into his mouth instead, and crack! He bit open the shell.
他拿起石头，但机敏的用核桃换掉石头放进嘴巴，然后咬开他！
A: I don't understand Mr. Chen. He never smiles or laughs. B: I know! He's a hard nut to crack.
熏a：我真不理解陈先生。他从来不笑。B：我知道。他是个难以了解的人。
When smelting and aluminum alloy that the founding is mutually related, a hard nut to crack that metallurgy technology is first of all encounter is adjust clean degree the rigorous demand.
熔炼和铸造相关的铝合金时，冶金工艺首先遇到的难题是对纯净度的严格要求。
While how to make oral English lessons effective and how to improve the student's oral communication competence has always been a hard nut to crack in the teaching of English.
如何上好口语课，如何培养学生的口头交际能力历来是英语教学上的难题。
Then he took the pebble and nimbly put a nut in his mouth in the place of it, and crack, it was in two.
他接过石子，却机灵地把一个坚果塞进了口中，咔嚓一声，咬成了两瓣。
Then he took the pebble and nimbly put a nut in his mouth in the place of it, and crack, it was in two.
他接过石子，却机灵地把一个坚果塞进了口中，咔嚓一声，咬成了两瓣。
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