Hold on to your dreams, even if the whole world doubts you.
The question is, are we happy to suppose that our grandchildren may never be able to see an elephant except in a picture book?
Every piece of plastic we produce should have a clear path to being reused or recycled.
不完全合同是常态，而非例外。
Your theory is crazy, but it's not crazy enough to be true.
意识就像一条河流——你永远无法两次踏入同一条思想之流。
真正的挑战不是建造一个便宜的房子，而是建造一个居住成本低的房子。
The greatest risk in agriculture is not taking any risks at all.