We face big and difficult challenges.
我们面临着巨大而困难的挑战。
And the big question: how difficult will it be financially for you to attend college?
最大的问题：上大学对你来说在财务上有没有困难？
Although it's possible to travel for free in a big city, it's damn difficult.
虽然在一个大城市里旅行是可能的，但这非常困难。
At this moment, our nation is facing a host of big and difficult challenges.
此刻，我们国家正面临诸多重大而困难的挑战。
It would be much too big and difficult to maintain.
这将使维护工作繁重而困难。
The politics of the Big Society remain difficult.
然而为实现“大社会”而定出一个政策框架仍然困难重重。
But change is difficult and the last thing you want is some 'big bang'.
但这个改变是艰巨的，你最后需要的是一些‘大爆炸’。
To make exclusive interviews with those big shots is difficult nowadays.
现如今对那些大腕做专访是很难的事情。
Making big-applications in PHP is not at all difficult if you work carefully.
如果您认真学习的话，用PHP开发大型应用程序一点儿都不难。
It is difficult to believe but we have to give a big thanks to everybody.
这很难让人相信，不过我们必须感谢所有人。
It is difficult to park these big cars.
这些大车很难找到地方停车。
This was a big three points for us but it was very difficult.
这是非常关键的三分，我们获得它不容易。
So we face big and difficult challenges.
因为这样，我们面前的挑战巨大而又艰难。
It's difficult to know how big the universe is.
很难弄清楚宇宙有多大。
Although they are big and heavy, it is not difficult for them to climb trees.
虽然它们很大、很重，但是它们爬树却不困难。
Wenger has had some difficult moments and each match comes with big pressure.
温格曾有过一些艰难时刻，每一场比赛都面临巨大压力。
How big is the risk of which, it is not difficult to imagine.
到底有多大的风险，这是不难想象的。
New village development is not only a big issue but also a difficult problem in China at present.
新农村建设是我国新时期建设的一项大事，同时也是一道难题。
Origin of humankind is a big difficult problem of science at the present time.
人类起源是当代的一大科学难题。
Even at night, big cities like New York glow from light pollution, making stargazing2 difficult.
即使在夜晚，象纽约这样的大城市因光污染而灯火通明，使得观望星星困难。
A small business is not difficult, from big to strong is not easy.
一个企业由小到大不难，由大到强不易。
It is very difficult to encounter a fellow villager in this big city.
繁华的大都市，能碰上乡人真不容易。
But for some other people, drawing is really a big headache, and they'll find it really difficult to master this skill.
但对于其他人来说，画画真是一个令人头痛的问题，他们会发现很难掌握这项技能。
But for some other people, drawing is really a big headache, and they'll find it really difficult to master this skill.
但对于其他人来说，画画真是一个令人头痛的问题，他们会发现很难掌握这项技能。
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