你必须用你大脑的能力来决定空间关系来提高读地图的效率和穿梭城市。
You have to use your brain's ability to determine spatial relationships to effectively read a map and navigate a city.
球不会象在网球比赛中那样，只在狭小的空间中穿梭。
The ball is not shuttling in a confined space, as in tennis.
大部分穿梭机任务都将宇航员带到空间站工作2周左右，这两周里的每一天都很忙碌。
Most shuttle missions take astronauts to the space station for two weeks or so, during which every working day is intense.
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