投我以桃，报之以李。
你把桃子投于我，我把李子回赠与你。桃子和李子价值相当，表明我本人是知恩图报的，也有互相赠送，礼尚往来的意思。
All changes, even the most longed for, have their melancholy; for what we leave behind us is a part of ourselves; we must die to one life before we can enter into another.
I’m not playing for the records. I play tennis because I love it.
A novel is not just a story, but a mirror reflecting the complexities of human nature.
A miner's safety should never be measured in cost-benefit analyses.
科学不是一个人的游戏。
历史中的优点似乎有三种，一种是来自气候和国家的纯粹地理位置，一种是来自政府形式和人民性格，一种是来自那些更细致的哲学原则和道德，可以称为哲学的推荐。
Happiness， like unhappiness， is a proactive choice.