The only limit to our understanding of the universe is our imagination.
The greatest threat to our forests isn't logging—it's indifference.
解释:乌鸦聚集在一起,虽然看上去很和好,实际上并不亲密;不慎重地结交朋友,虽似牢固,终必破裂。
I don’t believe in luck. I believe in hard work.
It is not a language's weakness but its strengths that control the gradient of its change: Alas, a language never escapes its embryonic sac.