1·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》
2·However, most mutations are deleterious.
然而，大多数突变是有害的。
3·Humanity undergoes changes, albeit small, with every generation: If a trait is beneficial it will live on, while deleterious ones slowly die off. Here are some superhuman traits that have persevered.
人类经历着变化，尽管微小，却一代接这一代不停止：如果某一特征有益，则将继续存在，而有害的倾向则消亡。
4·Error catastrophe occurs when high mutation rates give rise to so many deleterious mutations that they make the population go extinct.
当高突变率引发众多能导致种群灭绝的有害突变时，错误突变便出现了。
5·This [study] adds an important piece of evidence that inhaling secondhand smoke is deleterious and does things to the airway that are not good.
上述研究又提供了一个重要的证据证明吸入二手烟是有害的，对气道很不好。