1. The plane was then flying at an altitude of 8000 feet.
    当时飞机在八千英尺的高度飞行。

2. The plane flew at an altitude of 20000 metres.
    飞机在两万公尺的高空飞行。

3. At high altitudes of Tibet it is difficult to breathe.
    在西藏海拔很高的地方呼吸很困难。

4. He found it difficult to breathe at high altitudes.
    他觉得在高空呼吸困难。

1. 海拔：提到大章鱼,一般我们会想到深海,不过在恐怖片<高空海拔>>(Altitude)中,大章鱼来到了高空. 目前还没有上映日期的<高空海拔>>讲述了一伙年轻人坐小飞机航行,途中飞机失控,不可抑制的爬升到高空,在那里有一个巨大的章鱼状的怪物正等着他们…

2. 高程：本文所介绍的基于Java的GPS 接收机解析器从标准GPS 接收机的GGA 输出信息中解析标准时钟(Universal Time Coordinate, UTC)、纬度(Latitude)、经度(Longitude )和高程(Altitude)等基本授时和定位信息.

1. 海拔
    If something is at a particular altitude, it is at that height above sea level.

    e.g. The aircraft had reached its cruising altitude of about 39,000 feet...
           飞机已到达约3.9万英尺的巡航高度。
    e.g. The following day I ran my first race at high altitude.
           第二天我第一次在高海拔地区参加了赛跑。

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

    e.g. the altitude gave her a headache

    Synonym: height

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

    Synonym: elevationELALT

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