prepare的名词是preparation ,复数是preparations. 意为准备;预备;准备工作;(医药、化妆品等)配制品,制剂. 例句 Behind any successful event lay months ...
surface可数。surface的意思是表面,表层,面,水面,地面,液面,操作台。surface的例句It can simply be left on the work surface(把它放在操作台上就行...