"Forty-two percent of the earth's population live in areas where malaria transmitting mosquitoes exist.

VOA: special.2009.12.07

And the myth has to do with these sort of pictures I was just describing where we don't actually live on the surface of the Earth of in the light, but rather live in certain hollows in the dark where we're mistaken about the nature of reality.

那个传说与我一直形容的,这个大局有关,我们并不真正生活在地表,生活在阳光里,而是生活在某种暗无天日的黑洞中,一个我们都误解了现实本质的地方

耶鲁公开课 - 死亡课程节选

People must live on Earth just as astronauts live in a spaceship.

VOA: special.2010.05.30

Some of the animals live nowhere else on Earth.

VOA: special.2009.12.16

"The most important thing is that every one of us every child,every adult has a responsibility that their action, every action we make has an effect on the earth that we live in.

VOA: special.2010.01.21

On the the 40th anniversary of Earth Day, this warming planet we live on is posing serious new challenges to human civilization: increasingly severe droughts, floods,and storms across the globe, and slowly rising ocean levels.

VOA: standard.2010.04.21