Hard water, for example, has higher mineral and deposit content that can overwhelm a surfactant, so other chemicals have to be added to the shampoo to counteract the ions that make the surfactants ineffective.

例如，硬含有较高的矿物质和沉积物，以压倒表面活性剂，因此必须在中添加其他化学物质来抵消使表面活性剂失效的离子作用。

As for water type, hard water that has a high mineral content can weaken the taste of tea, so it's best to use filtered water in your kettle for the optimum results.

质方面，矿物质含量高的硬，冲淡茶香；建议使用过滤烧，才泡出绝佳口感。

But the water which comes to our houses is almost always hard water.

但是流到我们屋子里的, 不多总是硬。

He slithered over the side of the dragon and plummeted feetfirst toward the surface of the lake; the drop was greater than he had estimated and he hit the water hard, plunging like a stone into a freezing, green, reed-filled world.

他从巨龙的一边滑了下去，脚先触笔直地掉了进去，入的冲击比他预料中要强烈一些，像块石头一样掉进这个冰冷、长满芦苇的绿色世界。

Then you may begin to wonder: Do I have hard water?

那么你开始怀疑：我（家也）有硬吗？

If your water picks up calcium and magnesium in large amounts en route to your tap, it's considered hard water.

如果你的在通往龙头的途中大量吸收钙和镁，那就被认为是硬。

So what exactly is “hard” water, and how does it actually differ from “soft” water?

那么到底什么是“硬”，它与“软”有什么不同呢？

Hard water is safe to drink and may even be beneficial to someone who is mineral-deficient.

硬以安全饮用，甚至对缺乏矿物质的人有益。

Initially, you drenched your clothes in hard water and then you applied some soap.

最初，你在硬中浸泡了衣服，然后你使用了一些肥皂。

We don't want to be boosting the yellow, as does hard water and chlorine.

我们不希望增加黄色调，硬和氯气也是如此。

You don't force him, don't beat him, don't give him orders, because you know that 'soft' is stronger than 'hard', Water stronger than rocks, love stronger than force.

你不强迫他，不打他，不命令他，因为你明白“柔”比“刚”更强，比岩石更强，爱比强制更强。

I dove, kicking the water as hard as I could.

我潜入中，用尽全身力气踢。

And even if you live in a place that has hard water, it's still softer than feet.

即便你居住的地方质较硬，它依然比脚要柔软。

It reacts with the calcium and magnesium ions of hard water to form insoluble precipitate called scum.

它与硬中的钙镁离子反应，形成不溶性的沉淀物——浮渣。