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1·Initiates the ascent stage.

启动上升段。

2·The paper researched the rapid design method for ascent trajectory of multi-stage solid launch vehicles.

针对机动发射固体运载火箭开展上升段弹道快速设计方法研究。

3·Managers need then to stage Endeavour's ascent so that the shuttle's movements in orbit do not conflict with a Russian Soyuz vehicle that is supposed to be leaving the space station later this month.

管理人员们然后需要筹划奋进号的升空，使得这架航天飞机在轨道上的运动不与俄国的联盟号运载火箭相冲突，推测它要在本月晚些时候离开空间站。