That\\\'s hard to say, because the existing building structures are much, much larger.

很难说，因为那里的建筑结构种类实在太多。

youdao

Perhaps one of the differences with girls - and it \ 's very hard to generalize - is that they have more of a facility with speech.

很难一概而论，或许女孩子的不同之处在于她们更懂得倾诉的技巧。

youdao

Space exploration is a challenge to human beings. That 's why several nations try hard to carry out space exploration continuously.

太空探索对我们人类来说是个挑战，这也是为什么许多国家不断进行探索的原因之一。

youdao

Like many of U2's songs, it is an expressive love song with a melody that is hard to forget.

VOA: special.2009.04.10

That's why many of them are thinking really very hard of how to foster entrepreneurship, how to encourage innovation.

这就是为什么大家都在思索,如何才能培养企业家精神，如何鼓励创新。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

And once you... when you're having that bad of a season, it's really hard to get everyone passionate about it,

所以一旦赛季取得很差的成绩，就很难保持球队的激情，

足球部队长的领导力 - SpeakingMax英语口语达人

We have found that dying was easy: It's the living that's hard.

CNN: 'Dying was easy: It's the living that's hard'

That's important -- and that's hard to do.

WHITEHOUSE: Presidential Press Conference on the 2012 Budget

In the U.S. that's hard to come by.

FORBES: Magazine Article