低空的英文：
low altitude

参考例句：

The carbon14atoms oxidize to carbon dioxide which gets blown about and mixed up with lower atmosphere.
碳14原子氧化生成二氧化碳，向四周散去并与低空的大气混合。

He then directed Bundy to institute low-level photographic flights and to set up a meeting of top officials
于是他指示邦迪开始进行低空摄影飞行，并召集高级官员开会。

The losses in the low-level attacks on the bridges from the German anti-aircraft artillery were cruel
在低空轰炸浮桥时，英国空军由于德国高射炮炮击造成的损失是很惨重的。

Subsequent discoveries were made by geological mapping and low-level airborne radiometric surveys
地质填图和低空放射性航测又继续探明了一批矿点。

low是什么意思：
adj. 低的；在底部的；不足的；低于通常标准的；沮丧的；差的；状态不佳的
adv. 向下；在靠近…底部的位置；低于通常的水平；低声地
n. 低水平；低谷；低气压区
v. （牛）哞哞叫

low-velocity drop
低速度空投

To speak with a low, hoarse voice.
低哑地说用低而嘶哑的声音说话

To rate too low;underestimate.
低估对…估价太低；低估

Their eyesight is poor in low light.
光线很暗时他们视力不佳。

This cooking oil is low in cholesterol.
这种烹调油胆固醇含量低。

altitude是什么意思：
n. 高度；海拔；高处，高地；顶垂线；地平纬度；高级

parallel of altitude
等高圈;地平纬圈

traffic pattern altitude
起落航线高度

circle of equal altitude
等地平纬度圈

In these altitudes snow never melts.
在这样的高处，雪永不融化。

The altitude of maximum temperature is called the stratopause
极大值温度的高度称为平流层顶。