This is our planet.

这是我们的地球。

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This is our one chance at life on this planet. Our planet is in trouble and we are not reacting fast enough.

这是我们的一次机会，对于整个地球上所有生命。我们的地球处在危险之中，我们必须尽快行动起来。

youdao

Built with such goodies as a rock-vaporizing laser and cameras on every side, this new Mars rover is ready to go explore our neighbor planet.

这个新的火星流动站准备用来探索我们的邻星。

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"The important achievement of Apollo was a demonstration that humanity is not forever chained to this planet, and our visions go rather further than that and our opportunities are unlimited,".

VOA: standard.2009.07.16

"The bulk of our food production on this planet is dependent to some extent or another on oil or products of oil, so this goes right to the heart of,frankly, the way our society functions,"

VOA: standard.2009.10.20

This is our country and our planet.

FORBES: The Disease of More

If our planet is in this severe situation, then our belief is that we should not be starting from scratch at investigating mitigation options.

CNN: Can Bill Gates stop hurricanes? Scientists doubt it

This is a good thing because it keeps our planet habitable.

FORBES: Aliens, Sandy And The Coming Global Superstorms