This paper mainly discuss the problem of method and policy of spacecraft's large scale orbital maneuver.

论文研究了航天器大范围轨道机动的方法与策略。

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Faced with the problem of climate change, we should find an effective method of reducing greenhouse gases.

面对气候变化的问题，我们应该寻找有效的措施来减少温室气体。

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Because at the root of this problem is the question of the scientific method itself.

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The problem with your method of funding the art is that it is A and B deciding that C is going to pay for it.

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The advantage of this method of trying to solve the problem is that we already know how to do it.

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