chemical|chemicals

这个实验展示了一个化学反应。

This experiment demonstrates a ___chemical reaction.

化学工业对现代制造业至关重要。

The ___chemical industry is vital to modern manufacturing.

我们的老师用一个模型来解释这个化学过程。

Our teacher used a model to illustrate the ___chemical process.

许多食品含有化学品以保持新鲜。

Many food products contain ___chemicals to preserve freshness.

工厂在将废水排放到环境之前，必须进行处理以去除有害化学品。

Factories must treat their wastewater to remove harmful ___chemicals before releasing it into the environment.

这种清洁产品效果很好，但含有强烈的化学品，因此要在通风良好的区域使用。

This cleaning product is effective but contains strong ___chemicals, so use it in a well-ventilated area.