noxious

Gas or vapor that is harmful or unpleasant to breathe in.

A type of gas that is poisonous or very harmful.

Refers to harmful or poisonous emissions, often from industrial processes or vehicles.

有害杂草

A plant that is considered harmful to the environment, agriculture, or livestock.

有害或有毒的杂草。

有毒物质

A material or chemical that is poisonous or causes harm.

有害、有毒或非常令人不快的物质

难闻的气味

An extremely unpleasant or harmful odor.

一种极其难闻或有害的气味。