altitudes

n.

elevation especially above sea level or above the earth's surface

"the altitude gave her a headache"

同义词：height

the perpendicular distance from the base of a geometric figure to opposite vertex (or side if parallel)

angular distance above the horizon (especially of a celestial object)

同义词：elevationELALT

1. Mountaineers often experience lower oxygen levels at high altitudes.
   登山者在高海拔地区通常会经历氧气含量较低的情况。
2. The plane maintained an altitude of 30,000 feet during the flight.
   飞机在飞行过程中保持了30,000英尺的高度。
3.