elevation above sea level

With increased elevation above sea level, the flora components of the resource plants present corresponding vertical differentiation patterns.

随着海拔梯度的上升，资源植物的区系成分、性状特征表现出相对应的垂直分异规律。

It is customary to fly , so far as is feasible, at a uniform elevation above sea level but within a range of 750 to 1500 ft above the earth's surface.

在条件许可之下，一般都在海拔以上离地面750到1500英尺范围内的均匀高度上飞行。

That is different from the elevation above sea level atmospheric pressure and water temperature at 20 degrees centigrade higher than the saturation vapor pressure.

即不同海拔高程处的大气压力和高于20摄氏度水温时的饱和蒸汽压力。