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。

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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。

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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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"I think the public imagination plays a major part in the collecting genre, " notes Bonhams' Lindgren.

FORBES: At Auction

Husby is an area that has a lot of problems and a high crime rate, according to Lindgren.

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"It's incredibly lucky that no-one in the house was injured, " police spokesman Ulf Lindgren told TT news agency.

BBC: Stockholm train crashed into apartments 'by cleaner'