The magnetic pull of the city was hard to resist.

都市的强大魅力难以抗拒。

《牛津词典》

Museums have been trying hard to shed their stuffy image.

博物馆一直努力改变自己沉闷的形象。

《牛津词典》

The mechanics work hard to keep the helicopters airworthy.

机修工们为了保障直升机的适航性而努力工作着。

《柯林斯英汉双解大词典》

This might be hard to do when the teacher is writing on a board at the front of the classroom.

VOA: special.2009.09.06

PROFESSOR BAWENDI: The only But it's hard to imagine an irreversible compression the way we can just imagine an irreversible expansion.

,但是我们很难,像描述不可逆膨胀一样,来描述不可逆压缩。

麻省理工公开课 - 热力学与动力学课程节选

This decision is also hard to make because when you are a backend technology provider, it's like selling a piece of commodity.

之所以这是一个困难的决定还因为,当作为后台技术提供商时，就像出售一件商品似的。

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

It is hard to understate the consequences of Mr Rove being distracted from his job.

ECONOMIST: George Bush and his main adviser are in a pickle

Aside from the mechanics, the products are hard to find and cost more than male condoms.

CNN: Female condoms range from 'strange' to 'natural'

Sometimes it was hard to believe that we would ever get things moving again.

UNESCO: UK National Commission for UNESCO - Stars in their mines: Cornwall mining community makes it big in Hollywood