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。

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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。

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This paper introduces a wireless driving method for the micro capsule robot with an embedded permanent magnetic, by using an exterior rotating magnetic field.

针对微机器人有缆驱动的缺点，介绍了一种以外旋转磁场驱动内嵌永磁体的胶囊微机器人游动的无缆驱动方法。

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