Lindgren, for example, doesn't know when he'll fly, or how long his astronaut career may last.
举个例子来说吧，Lindgren并不知道他会在什么时候进行飞行，或者说他的宇航员生涯会有多久。
Lindgren and his classmates already are working toward the day when NASA will send astronauts to explore another planetary body.
Lindgren和他的同学已经在为NASA将宇航员送上其它星球探索的事业努力着。
In Copenhagen, Lindgren and the two Kadhum brothers walk around the hotel a couple of times to make sure they are not being followed.
在哥本哈根，林德格和两个卡胡姆兄弟在酒店周围转了几圈，以确保他们未被跟踪。
In Copenhagen, Lindgren and the two Kadhum brothers walk around the hotel a couple of times to make sure they are not being followed.
在哥本哈根，林德格和两个卡胡姆兄弟在酒店周围转了几圈，以确保他们未被跟踪。
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