In the 1960s and 1970s, most personal and corporate planes were propeller or turbo-prop aircraft, which fly at a lower altitude than jetliners.
在1960和1970年代，大部分个人和企业的飞机是飞行高度低于喷气式飞机的螺旋桨式或涡轮螺旋桨式飞机。
In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic information like altitude and direction.
1958年，澳大利亚科学家戴维·沃伦开发了一种飞行记录仪，可以追踪飞行高度和飞行方向等基本信息。
Kohler attributes the immediate cause of the abandonment to problems with corn production at a high altitude during short growing seasons.
科勒认为，（居住地）废弃的直接原因是高海拔地区的玉米生长季节较短，因此生产出现了问题。
Your body needs to get used to a high altitude before you climb to an even higher one.
在你爬到更高的地方之前，你的身体需要适应高海拔的环境。
A few precautions can help most climbers avoid altitude sickness.
一些预防措施可以帮助大多数登山者避免高原反应。
The plane made a dive to a lower altitude.
飞机俯冲到较低高度。
Other archaeologists have identified the immediate cause of this abandonment to be a series of short growing seasons that would have put pressure on corn production at that high an altitude.
其他考古学家已经发现导致这种遗弃的直接原因是一系列短暂的生长季节，而这将会给生长在高海拔地区玉米的生产带来压力。
Although the pressure of the cabin is adjusted to prevent altitude sickness, you could still experience sleepiness or a headache.
虽然机舱压力可以被调节，以避免人体发生高空反应，但你仍会感到困倦或头痛。
Altitude sickness usually begins when a climber goes above 8,000 to 9,000 feet.
高原反应通常发生在攀登者身处的高度为8000到9000英尺的时候。
Headwinds and downdrafts meant flying at a lower altitude than planned, which used up power too quickly.
大风和下降气流使得飞行高度比计划低，这样耗电也更快。
Coming in with a skinful, as I usually did, it was like dropping suddenly to a low altitude.
进门时我通常都喝得大醉，一进来便好像突然来到了海拔低的地方。
He reduced altitude and spotted a woman below.
他下降高度，下方有一个妇女。
Mr Buchanan, who on the same expedition also filmed tigers are living at a higher altitude than any others, has filmed wild cats worldwide for more than 10 years.
已在全球各地拍摄野生猫科动物10年之久的Buchanan先生，也在此次探险之列，主要拍摄生存在高海拔地区的老虎。
At a cruising altitude of 30, 000 feet, pressure outside of the plane is about two and a half times lower than what passengers experience on the inside.
在三万英尺的巡航高度，飞机外部的气压大约比乘客感受的内部气压低2.5倍。
The rocket stages should separate at an altitude of about 130,000 feet (24.6 miles or 39 km) and continue upwards until they hit a maximum altitude of 150,000 feet (28 miles or 45 km).
火箭的两级将在海拔13万英尺（24.6英里或39千米）的高空分离并继续上升直到海拔15万英尺（28英里或45千米）。
The rocket stages should separate at an altitude of about 130, 000 feet (24.6 miles or 39 km) and continue upwards until they hit a maximum altitude of 150, 000 feet (28 miles or 45 km).
火箭的两级将在海拔13万英尺(24.6英里或39千米)的高空分离并继续上升直到海拔15万英尺(28英里或45千米)。
In the case of a CO2 ion at an altitude of 125km, it spirals round 17 times a second.
比如，在125km高空的CO2离子，就会以每秒17圈的速度螺旋运动。
Instead the FAA recommends - emphasis on 'recommends' - such drones be flown away from populated areas, from aeroplanes, below a certain altitude and so on.
相反，联邦航空局建议——强调“建议”——这种无人机要在一定的高度之下，远离居民区，远离机场飞行，等等。
With this radar system and a specially trained Air Force crew the aircraft can operate at a low altitude and in night or adverse weather conditions.
有了这种雷达和经过特别训练的空军机组，飞机可以在很低的高度、夜间或不利的天气条件下飞行。
One could easily imagine releasing sulphuric acid from a high-altitude aircraft and studying the chemistry going on in its wake using another aircraft.
你可以很容易地想到从一架高海拔飞机上释放硫酸并搭乘另外一架飞机观察其化学反应。
When it is time to land, aircraft usually make a stepped approach to an airport, descending and then maintaining altitude for a while before descending again.
当到了该降落的时候，飞机一般采取分步法降到地面机场，即：先下降，然后维持该纬度一小会儿，再继续下降。
Released as a vapour at high altitude it should produce a screen of properly sized particles, even in a sky that is already hazed.
在高空把硫磺酸蒸发释放，即使是在已经充满云雾的空中，也会形成一层大小合适的微粒屏障。
The Pentagon is unable to explain images of what witnesses took to be a high-altitude rocket launched off the coast of southern California at sunset Monday, officials said.
有官员说，美国五角大楼无法解释星期一傍晚在加州南部出现的类似于高空发射火箭后产生的凝结尾流。
Further advised that the object found resembles a high altitude weather balloon with a radar reflector.
这个物体像是一个带有雷达反射器的高空气象气球。
The balloon will spend a few hours rising to a cruising altitude of around 36 km, where the sail will be 129 meters [423 feet] in diameter.
气球将会花费几个小时升到大约36千米的巡航高度，那里行船直径将达到129米【423英尺】。
The balloon will spend a few hours rising to a cruising altitude of around 36 km, where the sail will be 129 meters [423 feet] in diameter.
气球将会花费几个小时升到大约36千米的巡航高度，那里行船直径将达到129米【423英尺】。
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