They work very hard to build their nests.

为了筑巢，牠们非常努力地工作。

youdao

Like any habit, it can be hard to build the habit of reading.

像其它任何习惯一样，阅读也是一种很难养成的习惯。

youdao

Let's work hard to build more meaningful relationships in 2011!

让我们一起努力，在2011年建立更有意义的人际关系。

youdao

He urged the Mormons not to leave the land they had worked so hard to build.

VOA: special.2009.06.04

And the problem, in 1968 it was very hard to build a barricade across the Boulevard St. Michel, which was built by Hausmann at this time.

而在一九六八年,在圣米歇尔大道上,构筑街垒都是很困难的,那条大道就是豪斯曼建造的

耶鲁公开课 - 1871年后的法国课程节选

While many are working hard to build the tents and stages for the event, few want to speak about the man at the center of the occasion.

VOA: standard.2009.08.29

And there are of signs new reactors will be as hard to build as ever.

FORBES: New Boost For Nukes?

Seton Hall has worked hard to build its fan base since it moved to Newark.

WSJ: Seton Hall vs. Syracuse: An Open Hall With an Orange Twist

It is so hard to build trust between enemies and so easy to break it.

CNN: Diaries of hope and hate: Five days in the Middle East