无害物质的英文

i oxiou u tance

innocuous substance

innoxious substance

• 无害:    harmless; do no ha ...
• 物质:    matter; substance; ...
• 极有害物质:    extremely hazardou ...

例句与用法

1. Allergic reactions can occur when the immune system over reacts to innocuous substances
   过敏反应可能发生当免疫系统起反应对无害物质。