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。
一种难以寻找而且难以对付的坚果。
他是一个难对付的家伙。
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。
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。
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。
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。
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。
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。
I know! He's a hard nut to crack.
我知道。他是个难以了解的人。
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。
Jeff: This is indeed a hard nut to crack.
杰夫：这实在是一个棘手的问题。
This problem is a hard nut to crack.
这个问题是块难啃的骨头。
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。
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。
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。
她是一个难对付的家伙。
The unit in translation is a hard nut to crack.
该单位在翻译是很难啃的骨头。
Mr. White is a hard nut to crack.
怀特先生是个难以对付的人。
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。
Actually, EST Reading is a hard nut for English teachers to crack.
然而，科技英语阅读教学是个难解的课题。
Actually, EST Reading is a hard nut for English teachers to crack.
然而，科技英语阅读教学是个难解的课题。
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