to serve as a replacement usually for a time onlyassigned to pinch-hit as a math teacher for the remainder of the semester
assigned to pinch-hit as a math teacher for the remainder of the semester
cover, fill in, stand in, step in, sub, substitute, take over
understudyrelieve, spelldouble (as)
in 1911
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。