Soap does not lather well in hard water.

肥皂在硬水中起不了多少泡沫。

《牛津词典》

The fossils at Dinosaur Cove are embedded in hard sandstone.

恐龙湾中的化石嵌在坚硬的砂岩中。

《柯林斯英汉双解大词典》

I choose to believe in hard work, but not so much in talent.

我选择相信努力工作，但不太相信天赋。

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Even in hard times and some might say especially in hard times people still show concern about others.

VOA: special.2009.11.02

But in hard drives where we actually have these moving platters, here is in fact, how we get from electricity and magnetism to those zeros and ones.

但是在传统硬盘中我们确实有高速运转的磁盘，这就是事实，但问题是我们如何,把电磁信号转化为0和1的。

哈佛公开课 - 计算机科学课程节选

So, I think it's this balance between working very hard and being involved in the greater community, I would say.

所以，一方面要努力学习，一方面要参与大型社会活动，我想，他们需要把握好平衡。

图书馆经常人很多 - SpeakingMax英语口语达人

That, in turn, means that vehicles are less subject to twisting forces in hard turns.

CNN: Fat and fast: High-performance gets big

Our Founders believed only in incremental change, in hard choices, in the give-and-take of inter-branch negotiation.

FORBES: Obama's Lesson For The Tea Party

Undercover police in Hard Rock Cafe T-shirts escorted two people off the dance floor.

CNN: IN THE GRIP OF ECSTASY