height above touch-down

例句：

1. 1. The mountain is at an altitude of 2,500 meters above sea level.
   这座山海拔2500米，比海平面高。
2. 2. The astronaut reached the altitude of 38,000 feet during the spacewalk.
   宇航员在太空行走期间达到了38000英尺的高度。
3. 3. The tallest building in the city is over 100 stories high, above the height of many skyscrapers.
   这座城市最高的建筑有100层以上，超过了许多摩天大楼的高度。