大学英语词汇短语释义解析及例句 direct ascent


释义：

direct ascent 直接起飞

例句：



Direct ascent interceptors such as exo-atmospheric ABM missiles, ballistic missiles with modified guidance logic, space boosters carrying nuclear payloads, and homing vehicles such as the miniature vehicle system undergoing development by the United States.



For example, instead of the lunar rendezvous method that NASA chose for the Apollo program, the player can opt for Earth-orbit rendezvous or even direct-ascent where a single giant spacecraft lifts off from Earth and lands on the Moon.