A teaching post became vacant and he leapt at the chance.教师职位出现了空缺，他马上抓住了这个机会。He was offered a teaching job and decided to return to academic life.他谋到了一个教师职位并决定回归学术生活。For years, Galileo grubbed away in underpaid mathematical teaching posts.伽利略有好些年在收入菲薄的数学教师职位上苦干。