replace/replacement

replace /riˈpleis/ vt. 1.替换，取代：Nowadays, computer has replaced man in many fields. 如今，计算机在许多领域取代了人。［考句］ Many in the credit industry expect that credit cards will eventually replace paper money for almost every purchase. 信用卡行业的很多人期盼着信用卡终究要在几乎每一笔购买中替代纸币。 2.把…放回原处：replace a book on the shelf 把书放回书架上；replace the newspaper after reading 报纸阅后放回原处

［辨析］replace 表示“替代”，最为普通和随便，可以表达任何理由的替换，尤其适用于用新的来代替旧的、坏的或遗失的，如： replace the burnt-out bulb with a new one；displace指的是 “强行替换”，经常不必表示被替换的东西是否无用或无效。 replace 指替换或取代时，可用于人，也可用于物，常和by或with连用，如：replace A with B 用B代替A；A is replaced by B. A被B取代了。substitute 指“以…代替”，常和for连用。如：substitute A for B 用A代替B

 replacement /riˈpleismənt/ n. 1.［u］替代，替换: in replacement of… 代替…；the replacement of one mobile medical team after another 巡回医疗队的轮流更换 2.［c］替代的人(或物): We need a replacement of the secretary who left. 我们需要一个人来接替已离职的秘书。