This will involve some daring, with the aircraft spending all day climbing as its batteries are recharged and then descending slowly under power throughout the night to conserve energy.

 
  • 这得需要相当多的勇气,因为电池充电时,飞机要花整天的时间爬升,之后在夜间为保存电能要低功率缓慢下降。
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