Silence is the perfectest herald of joy.

Never be the brightest person in the room; if you are, you're in the wrong room.

In the end, we will remember not the words of our enemies, but the silence of our friends.

脆弱不是软弱，而是彻底的诚实。

投资更清洁的煤炭技术是对能源未来的投资。