All other things are but shadows, not substances. What's the use of taking hold of shadows?

所有其它的事物不过是影子而已，不是实体，抓住影子有什麽用呢？

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She found many families were being exposed to high, sometimes deadly, levels of chemicals and other toxic substances, but she was not allowed to make her information public.

她发现，许多家庭都暴露在高水平的、有时是致命的化学物质和其他有毒物质中，但她不被允许公开自己的信息。

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In the unfertilized egg, the substances are inactive and are not distributed homogeneously.

在未受精卵中，这些物质是不活跃的，而且分布不均匀。

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Weissman says manufacturers often promote a product's recycled content, but might not mention,for example, that it contains toxic substances.

VOA: standard.2009.03.30

And according to Klawans and others, ritual impurity arises from physical substances and states which are not in themselves sinful.

据克洛文和其他人所说，仪式的不洁是由自身有罪的,物质和状态引起的。

耶鲁公开课 - 旧约导论课程节选

But this isn't very convincing. Only one set of diseases is said to generate ritual impurity, and many substances these are not sources of ritual impurity to Israel's priests.

但这不是很令人信服，只有某一疾病,时由于不洁的仪式引发的，很多,这些对以色列祭司来说并不是不洁的来源。

耶鲁公开课 - 旧约导论课程节选

All 50 states allow PAs to write prescriptions, though not for controlled substances in Kentucky or Florida.

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The advanced imaging scanners would not have caught substances hidden in a bodily orifice or substances concealed by folds of skin on an obese suspect, he added.

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In many instances, the report said, the substances are not yet approved for human use.

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