adj.高空的;
例句:
The high-altitude plane was and still is a remarkable plane.
这种高空飞机过去是现在仍然是一种了不起的飞机.
The high-altitude plane was and still is a remarkable bird.
该高空飞机过去是现在仍然是一种了不起的飞机.
They were kitted out with the latest gear for high-altitude climbing.
他们配备了攀登高峰用的最新式装具.