high-altitude holding的意思|示意

In such a scheme, a payload vehicle (holding, say, a satellite) would piggyback to high altitude aboard the scramjet, which in theory could reach near-orbital speeds.

在这个方案中，一个载物飞行器(比如说搭载着卫星)将(首先)搭载超燃冲压发动机进入相当高度，理论上能够达到近似轨道速度。

The tropical mountain rain forest located at mid-high altitude with slight anthropogenic disturbance had the highest soil nutrient-holding capacity and integrated soil quality index.

位于中、高海拔，人为干扰最轻的山地雨林原始林具有最好的土壤养分保持能力，土壤综合质量指数最高。