So if you have some region of spaceS and you call its boundary surface S and you let n be the normal vector that goes out of the region R.
如果存在一些区域空间,边界为曲面,定义n为指向区域R外的法向量。
2
Today, the space station?s exterior structure is as long as an American football field and it has about the same internal living space as a Boeing 747 jumbo jet.
今天空间站的外面结构长度约有一个美式足球场一般长，而内部的生活空间约像一架波音七四七珍宝客机般大。
3
This will automatically reserve the remaining disk space for the PS3's game operating system.