The sooner we started working on the technology required for interplanetary travel and for sustaining life beyond Earth, the better.

我们越早开始研究星际旅行以及在地球以外的地方生存所需的技术就越好。

Harvesting the riches of asteroids might be essential for establishing future space settlements, powering interplanetary travel, and building things that are definitely not moons.

收获小行星的财富对于建立未来的太空定居点、为星际旅行提供动力以及建造绝对不是卫星的东西可能是必不可少的。

So, if you're looking for your next interplanetary travel destination, you might want to choose somewhere else instead -- especially since the Earth's future isn't looking too great right now.

所以， 如果你正在寻找你的下一个星际旅行目的地，你可能想选择其他地方——尤其是地球的未来现在看起来不太美好。

By the year 2000, he thought we would have found intelligent life on Mars, that interplanetary travel would be commonplace, that we would have cured the common cold and cancer, and that modern art would have disappeared.

他认为到2000年，我们会在火星上发现智能生命，跨星球旅行将成为司空见惯的事，我们会治愈普通感冒和癌症，现代艺术将会消失。