我们的飞机下降到了三千米的高度。
十分钟后，显然发觉飞机因高度下降过快而失去控制。
Ten minutes later it became clear that the plane was losing altitude too fast to make it.
飞机以接近海平面的机场高度开始飞行、爬升、巡航、下降和接近海平面的机场着陆。
The airplane starts its flight at an airport altitude near sea level, ascends, cruises, and descends to a landing airport near sea level.
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