- He has to be going fast. - Exactly.

-他的速度得快 -说得对
Which means we need to make the mav lighter.

也就是说得把飞行器变轻一些
A lot lighter. 5,000 kilograms lighter.

得减轻很多减轻五吨
You can do that, right?

你能做到吧
There's some gimmes right off the bat.

有些重量很容易减掉
The design presumes 500 kilograms of martian soil and samples.

设计时假设带500千克火星土壤标本
Obviously we won't do that.

显然用不着了
And there's just one passenger instead of six.

而且宇航员从六名减少为一名
With suits and gear, that's another 500?

算上装备又轻了500千克
Ditch the life support, don't need it.

丢掉生命维持设备用不上了
And we'll get Mark to wear his Eva suit the whole trip.

而且我们会让马克全程都穿舱外服
Wait a second. If he's in his Eva suit,

慢着如果他穿舱外服