In the course of evolution, some birds have lose the power of flight.
在演化过程中一些鸟失去了飞行的能力。
In the course of evolution, some birds have lost the power of flight.
在进化的过程中，一些鸟丧失了飞行能力。
Man's flight through life is sustained by the power of his knowledge.
生命航程是知识的能量支持的。
Man's flight through life is sustained by the power of his knowledge.
生命航程是知识的能量支持的。
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