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.
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。
3
The effect of reser- ve fuel for diverting, holding and en route replenishing has been considered. The corrections for aerodrome pressure altitude and head and tail wind have also been done.