If water costs more, they say, we will conserve it better.
支持者们认为,如果水价提高我们能更好的保护水资源。
So the body needs salt and knows how to find it and how to conserve it.
所以我们的身体需要盐、知道怎么去找到盐,也知道如何节约用盐。
By contrast, we use and even abuse nature, but have yet to learn to conserve it.
相比之下,人类只学会了如何破坏自然而没有学会保护自然。
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