化学物质

• chemical substances

例句

1. 这座工厂排出的化学物质改变了整个地区的生态。
   Chemicals in the factory's sewage system have changed the ecology of the whole area.
2. 灭草剂用来摧毁或抑制植物，尤指杂草的生长的化学物质
   A chemical substance used to destroy or inhibit the growth of plants, especially weeds.
3. 杀真菌剂杀死真菌或抑制其生长的化学物质
   A chemical substance that destroys or inhibits the growth of fungi.
4. 氨是种化学物质。
   Ammonia is a chemical substance.