to cover a class for an absent teacher
代课教师
substitute teacher
王老师病了，由李老师代课。
Teacher Li came in as a substitute teacher when Teacher Wang was ill.
汉译英翻译词典收录86165条汉英翻译词条，基本涵盖了全部常用中文字词的英语拼写、翻译、音标、读音、用法、例句等，是英语学习的有利工具。