deleterious
adj. 有毒的,有害的
例句
Petty crime is having a deleterious effect on community life.
轻罪对于社区生活正在产生有害影响。
《柯林斯英汉双解大词典》
However, most mutations are deleterious.
然而,大多数突变是有害的。
It is also common knowledge that milk containing deleterious organisms is an unsuitable article of food.
乳品中含有有害微生物不适合食用是基本常识。