A third is certain basic chemicals such as carbon, oxygen and nitrogen.

第三种是某些基本的化学物质，如碳、氧和氮。

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Most scientists say life’s basic chemicals formed on Earth.

绝大多数科学家认为，构成生命物质基础的化学元素都来自地球本身。

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Ammonia has been one of the more difficult basic chemicals to synthesize.

氨曾是一个较难合成的基本化工原料。

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This is the first example of a life form that can live with a different set of basic chemicals.

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So, the oil price rises and those basic chemicals that are tied to the oil price will also rise.

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China, which sees basic chemicals as strategic, is undeterred by market signals.

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