The hard working useful people are described as "the salt of the earth".

勤劳能干的人被称为“社会中坚”。

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You are the salt of the earth.

你们是世上的盐。

youdao

People said he was the salt of the earth.

人们说他是the salt of the earth（好人，或社会中坚、栋梁）。

youdao

People said he was the salt of the earth.

VOA: special.2011.02.27

And they wanted to use a soluble salt of citric acid, so they could have used sodium, they could have used potassium.

而且他们想用一种柠檬酸的可溶性盐，他们本可以用钠，也可以用钾。

麻省理工公开课 - 化学原理课程节选

Let's take salt, solid, and dissolve it in a bunch of liquid water.

我们把食盐晶体，溶解在一些水中。

麻省理工公开课 - 热力学与动力学课程节选

There are salt layers similar to, but not as thick as, the pre-salt of Brazil.

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The salt of the seawater draws the fresh water across the membrane, leading to a build-up of pressure which forces water through the turbine, generating electricity.

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After experimenting with more than a dozen different formulations, drying them with custom-made machinery and heating them in ovens to test shelf life, Nektar hit upon a successful recipe that mixes insulin with glycine (an amino acid), citrate (the salt of an organic acid found in humans) and mannitol (a sugar used in intravenous products).

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