放焰火会散落大量有毒的化学物质。

Fireworks can rain down toxic chemicals Photo: getty.

youdao

对这种方法可以做些“微调”使其能对特定的有毒化学物质做出反应。

This arrangement could be "tuned" to react to specific toxic chemicals.

youdao

我们正在测定自来水中的有毒化学物质。

We are testing for poisonous chemicals in the running water.

youdao

大量的这种化学物质是有毒的；

This chemical is toxic in large amounts;

youdao

大量的这种化学物质是有毒的；

This chemical is toxic in large amounts;

youdao