1replace sb/sth (as/with sb/sth) to take the place of sb/sth; to use sb/sth in place of another person or thing 取代;代替:
Teachers will never be replaced by computers in the classroom.在课堂里,老师永远也不会被计算机所替代。
2replace sb/sth (with sb/sth) to exchange sb/sth for sb/sth that is better or newer 更换;换成好的或新的;调换:
We will replace any goods that are damaged.我们会更换任何损坏的货物。
3 to put sth back in the place where it was before 放回原处:
Please replace the books on the shelves when you have finished with them.那些书看完后,请放回书架上。☞ Put back is more common and less formal. put back较常用,多用于非正式场合。