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》

Beyond pity at seeing residents of a rich, proud country scavenging for food, hoarding bottled water and huddling for shelter on schoolroom floors, it was hard not to feel admiration as well.

看到一个富裕而骄傲国家的居民四处寻找食物、储藏瓶装饮用水和避难于学校教室，在地板上缩成一团的情形，除了同情之外很难不感到钦佩。

youdao

Hard asphalt mixture have well pavement performace, and have better mechanical performance fatigue resistance and water damage resistance.

硬质沥青具有良好的路用性能，在常温状态下还具有较常见基质沥青好的力学性能、耐疲劳性能和水稳性。

youdao

It pulls less hard on the Earth, but even less hard on the water on the far side, so a watery bulge forms on the far side as well -- a high tide roughly 12 hours out of synch.

CNN: The sun, the moon and the Titanic