Our water is very hard.

我们的水很硬。

《牛津词典》

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 Romans observed that, when volcanic ash mixes with water and then cools, it gets extremely hard and almost impossible to break up.

罗马人观察到，当火山灰与水混合然后冷却，火山灰变得非常坚硬，几乎不可能分解。

youdao

A company that can keep its head above water can survive economic hard times.

VOA: special.2009.05.10

Cattle and buffalo wastes. Water was hard to find,too.

VOA: special.2010.04.15

grass and water sometimes hard to find.

VOA: special.2010.03.18

Labu has been using a system of huge fans and warm water and hard work to try to keep at least some of the navel oranges on his thousand acred orchard viable.

NPR: Cold Weather Damages California Crops

There has been much heated debate this week about how much more oil there is to come - probably a lot, but not necessarily offering up quite such generous tax revenue once the industry has been incentivised to drill and develop in deep water and hard-to-reach reserves.

BBC: Scottish independence: Fjords flowing with funds

Softer water, says Dietrich, can have a different "ecology" to hard water.

BBC: Is there really a north-south water taste divide?