huà xué biàn huà
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  • n.chemical change, in which one substance turns into another

    • méi shì tōng guò huǎn màn de huà xué biàn huà xíng chéng de

      通过缓慢化学变化形成

      Coal forms by a slow process of chemical change.

    • zhǐ rán shāo shí huì fā shēng huà xué biàn huà

      燃烧发生化学变化

      The chemical change takes place in paper when it burns.

    • zhè xiē huà xué biàn huà dōu shì zì rán fā shēng de

      这些化学变化自然发生

      These chemical changes occur naturally.