我们可用反应式表示这种化学变化。

This chemical change can be expressed by an equation.

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表面上看，空气质量监测似乎只是一种反应式措施。

On the surface, air quality monitoring can seem merely reactive.

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表面上看，空气质量监测似乎只是一种反应式措施。

On the surface, air quality monitoring can seem merely reactive.

youdao