这时地球人已经学会并掌握了太空飞行。

We have learned and mastered space travel.

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它把光照反射到外太空（也就是人们所熟知的增加地球的反照率）同样也能降低地球的温度。 皇家学会的笔者认为有两种途径实现此作用。

Reflecting sunlight back into outer space (increasing the Earth’s albedo, as it is known) would also cool the planet, and the Royal Society’s authors consider two ways of doing so.

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正如华盛顿特区布鲁金斯学会的李侃如(Kenneth Lieberthal)所言，它也意味着讨论诸如太空和网络战等议题。

As Kenneth Lieberthal, of the Brookings Institution in Washington, DC, argues, it also means talking about such issues as space and cyber-warfare.

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