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。
2
Exterior flow field measurement above smooth and different riblet surfaces was carried out in a low speed wind tunnel by means of hot-wire anemometry.
利用热线风速仪，对光滑表面和多个脊状表面在低速风洞中进行了表面流场测试。
3
This paper introduces a wireless driving method for the micro capsule robot with an embedded permanent magnetic, by using an exterior rotating magnetic field.