A country's production of sulphuric acid is a good indication of its industrial might, because at some stage nearly every manufactured good comes into contact with this highly corrosive stuff.

一个国家的硫酸产能是其工业能力的良好指针，因为在某些阶段，几乎各个制造行业都要用到这种高度腐蚀性的原材料。

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In the second stage, lactic-acid molecules are linked into long chains, or polymers, in chemical-reaction vessels, to produce PLA.

其次，乳酸分子于化学反应容器中连成长链或组成聚合物，然后产生聚乳酸纤维。

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The activity of ascorbic acid peroxidase (APX) showed no remarkable change in the initial infection stage, but increased during later stage of infection.

抗坏血酸过氧化物酶(APX)的活性在感染的初期变化不明显，而在感染的后期活性有所增加。

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In the second stage, lactic-acid molecules are linked into long chains, or polymers, in chemical-reaction vessels, to produce PLA. What Dr Lee and his colleagues have succeeded in doing, as they report in Biotechnology and Bioengineering, is to produce PLA directly, in a one-stage process, in bacteria.

ECONOMIST: Synthetic biology