But then again, most sailboats do have a motor for tooling around in the harbor, which is how Dr. Friedman describes being in Earth orbit.
但是，反过来说，大多数帆船都配有马达，以便在港口内行驶，弗里德曼博士这样描述在地球轨道的情况。
The astronauts will attach a motor that will boost the satellite into its proper orbit.
宇航员们将安装一个发动机，以推动卫星进入正常运行轨道。 1。
The astronauts will attach a motor that will boost the satellite into its proper orbit.
宇航员们将安装一个发动机，以推动卫星进入正常运行轨道。 1。
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