色多多在线观看播放-色多多在线观看高清免费-色多多在线观看视频-色多多在线看-欧美aaaaa性bbbbb小妇-欧美aaaav免费大片

The periodic table is not just a chart; it’s a story of the universe.

"The world is not a wish-granting factory."

It's survival of the fittest.

I don't want to be a hero. I want to be a human.

我們生命中的偉大時刻是當我們獲得勇氣將我們的惡行重新命名為我們最好的部分的時候。

幸福的秘訣是：盡量擴大你的興趣，對感興趣的人和物盡可能友善。

The world has the technology - either available or well advanced in the research pipeline - to feed on a sustainable basis a population of 10 billion people.