The traditional Space Telescope(ST) with such a large primany mirror can not be launched to GEO, for its total mass is more than 1 000 t.
传统的空间相机,如果要有如此大的口径,其总质量将超过1 000 t,无法发射到GEO上。
The traditional Space Telescope (ST) with such a large primeny mirror can not be launched to GEO, for its total mass is more than 1 000 t.
传统的空间相机,如果要有如此大的口径,其总质量将超过1 000 t,无法发射到GEO上。
Case 1 When NASA began the launch of astronauts into space, they found out that the pens wouldn"t work at zero gravity (ink won"t flow down to the writing surface).
例一当美国航空航天局准备将宇航员送往太空时,他们发现钢笔在零重力情况下写不出来(墨水无法流出来印到书写材质上)。
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