A surprising number of ailments are caused by unsuspected environmental factors.
有大量疾病是由不明环境因素造成的。
He died in 1984 of an unsuspected brain tumour.
他于1984年意外死于脑瘤。
英汉双解词典包含141091条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。