The oldest， shortest words—'yes' and 'no'—are those which require the most thought.

系外行星研究的未来在于开发更灵敏的仪器和全球科学家的合作。

当你用尊重培育植物时，它们会用丰饶回报你。

And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'

如果你愿意，我们可以回到那个山洞。

压力是一种特权。