surface area

名词 surface area:

1. the extent of a 2-dimensional surface enclosed within a boundary
   同义词：area, expanse

1. The hard outer portion or surface area of bread.
   面包皮面包的表面区域的硬皮
2. In printing, the surface area taken up by type of a given size. Thus an8 point type occupies a print area of8 point em.
   在印刷技术中，给定尺寸的铅字所占有的表面积。这样，一个8点的铅字则占有8点em的印刷面积。