noxious

1. ADJ A noxious gas or substance is poisonous or very harmful. 有毒的; 有害的[usu ADJ n]

Many household products give off noxious fumes. 很多家用产品散发有害气体。

2. ADJ If you refer to someone or something as noxious, you mean that they are extremely unpleasant. 令人厌恶的[正式] [usu ADJ n]

...the heavy, noxious smell of burning sugar, butter, fats, and flour. ...糖、黄油、油脂和面粉浓烈难闻的焦糊气味。

Their behaviour was noxious. 他们的行为令人生厌。