Aerodynamic(passive)instability is a disadvantage for manned vehicles . 气动力(被动)不稳定对于载人飞行器是不利的。
Aerodynamic (passive) instability is a disadvantage for manned vehicles . 气动力(被动)不稳定对于载人飞行器是不利的。
The current u . s . space initiative envisions returning astronauts to the moon within 15 years and then launching manned flights to mars and beyond at an unspecified date 当前,美国宇航局初步设想让宇航员在15年内重返月球,在此之后发射载人飞行器登陆火星。
The beijing morning post quoted huang chunping , chief consultant for china ' s manned launching vehicle system , as saying the shenzhou 7 spacecraft would be ready this year 北京晨报源引中国载人飞行器项目的总顾问黄春平的话表示,神州7号飞行器将在今年准备就绪。