The bread in the cupboard was stale and hard to eat.

橱柜里的面包不新，吃。

A hard choice needs a strong moral compass.

艰的选择需要坚定的道德指南针。

The reward money was apportioned among those who worked very hard.

奖金分给那些努力工作的人。

He abbreviated so much that it was hard to understand his article.

他的文章缩写词使用太多，令人费解。

The hardest work was assigned to the strongest laborers.

最繁重的工作分配给最强壮的劳工。

The biology of bacteria can be quite hard to understand.

细菌生物学有时会理解。

We must work hard to acquire a good knowledge of English.

我们必须用功学习才能精英语。

He braked hard and narrowly avoided a parked van.

他使劲踩剎车，险些撞上一辆停着的面包车。

Is it hard to bear with criticism?

忍受批评困吗?

Research workers find it hard to correlate the two sets of figures.

研究人员发现使这两组数字互相关连。

Such a conclusive evidence is hard to be explained away.

如此确凿的证据是巧辩的。

Hard work is the cornerstone of success.

努力工作是成功的首要因素。

It’s hard to understand the colloquial idioms of a foreign language.

外语里的口头习语懂。

It is hard to prevent concrete from creeping.

止水泥变形。

Real pacification is hard to get in the Vietnamese countryside.

在越南的乡下真正的安宁是实现的。

In areas like this, drugs are hard currency and life is cheap.

在这些地区毒品是硬货，人命不值钱。

Ben is not child but he tries hard.

本不是学者型的孩子，但是他努力。

These are useful in hard rock mining where high brisance, high shattering effects, are desired.

这种炸药，对需要高威力、高破碎效应的坚硬岩石矿，是有用的。

A little bonus will give the employees an incentive to work harder.

一点奖金可以刺激雇员更加努力地工作。

The company found it hard to survive in a changing marketplace.

这家公司以在不断变化的市场中生存。