touch-down zone elevation

例句：

1. 1. The pilot made a touch-downat the airport.
   飞行员在机场着陆。
2. 2. Theplane's altitude was determined by thetouch-down zone.
   飞机的高度由着陆区决定。
3. 3. The astronaut touched downon the moon's surface.
   宇航员在月球表面着陆。