The more worrying changes are happening on a chemical level.

更令人担忧的变化发生在化学层面。

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There are tens of thousands of proteins in the body that build and control life at the chemical level.

在我们的身体里存在着上万种蛋白质，它们以化学方式建立和支配生命。

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The level of formaldehyde gas in her kitchen was twice the maximum allowed by federal standards for chemical workers.

她厨房的甲醛气体含量是联邦为化工工人设立的最大值标准的两倍。

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Feczko emphasized that these drugs are different from Vioxx on a chemical level.

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Only chemical chromatography that measures several samples for their average level of capsaicin, the chemical that gives peppers their bite, can establish a record claim.

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The low-level but frequent release of this chemical ensures regular anti-bacterial washes of the wound.

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