Once man came to be seen as developing in the process of evolution, the idea of a substance which is contained in his essence seemed untenable.

一旦人类被看作是在进化过程中发展起来的，那么“人类是包含在他的本质中的一种物质”的观点似乎就站不住脚了。

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This is because tomatoes contain a high concentration of a substance called lycopene, which is an antioxidant.

这是因为番茄中含有高浓度的番茄红素，是一种抗氧化剂。

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He then analysed the activity of their genes, as measured by the production of a substance called messenger RNA.

然后他分析了他们基因的活性——靠测量信使RNA的多少。

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Hartline was apparently under the influence of a substance that caused him to hallucinate, Baer said.

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How can you convert it into something of a substance in such particular area as European security?

WHITEHOUSE: Diplomatic Reception Room

The VEGF gene is so-called because it controls production of a substance known as vascular endothelial growth factor.

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