surface area
noun [ C usually singular ] mathematics specialized uk/ˈsɜː.fɪs ˌeə.ri.ə/ us/ˈsɝː.fɪs ˌer.i.ə/
（物体的）表面积
the area of a surface or of all of the outer surfaces of something
the surface area of a cube 一个立方体的表面积
See also: area