你应该检查一下风向以确保飞行安全。
You should check the wind conditions to make sure it's safe to fly.
模拟结果验证了北京地区城市对下风向地区O_3的输送影响。
Simulated results validated the influence of O_3 transportation from urban to the downwind areas.
其影响区域主要为城市主导风向的下风向佳木斯市城市东部地区。
Its impact is mainly urban areas downwind of the prevailing wind Jiamusi City East.
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