1.Certain people may be predisposed to mental illness.
有人易患精病。
2.Deviant behaviour is one of the features of certain types of mental illness.
反常举动是某精疾病的特征之一。
3.Since Laing refused to view mental illness in biomedical or clinical terms, he has often been labelled as part of the so-called 'antipsychiatry' movement.