Methylglyoxyl is not only a very reactive glycotoxic component but also an active precursor to inflammation.

丙酮醛 不单单是一种活跃的糖毒性物质，同时也是炎症反应的前体物质。

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A vitamin precursor that the body converts to its active form through normal metabolic processes. Carotene for example is a provitamin of vitamin a.

维生素原一种由身体通过正常新陈代谢过程，将其转化成活跃形式的维生素的前体，比如，胡萝卜素是维生素a的维生素原。

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A carbon precursor like methane can be vaporized using heat where the melted precursor reacts with a catalytically active substrate to form graphene on the surface.

类似于甲烷的碳前体可吸热蒸发，熔化的前体和具有催化活性的基底相反应并在表面形成石墨烯。

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The mouse work also showed that the retrotransposons were jumping mainly into genes that are active while precursor cells are changing into their destined cell types.

ECONOMIST: Brain development may be influenced by genetic parasites

LINE-1 messengers, suggesting that retrotransposons are active in these precursor cells.

ECONOMIST: Brain development may be influenced by genetic parasites