在进行热气流翱翔时．高度低的飞行员拥有优先通行权（因为他一般难以观察上方情况）。
When soaring in thermal currents, the lower pilot has a priority on right-of-way (it is difficult for him to observe the situation in general).
在进行热气流翱翔时．高度低的飞行员拥有优先通行权（因为他一般难以观察上方情况）。
When soaring in thermal currents, the lower pilot has a priority on right-of-way (it is difficult for him to observe the situation in general).
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