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了）。

surface的例句：In contrast with its surface fleet，Britain's submarine force was relatively small（同其水面舰队相比，英国的潜艇部队规模相对较小）；The road surface has started breaking up（路面已开始开裂）。