礼尚往来。往而不来，非礼也；来而不往，亦非礼也。
【释义】：礼节重在相互回应。送出礼遇而对方不回应，这是不合礼数的；接受了别人的礼遇却不回报，同样也是不符合礼的要求。
The true measure of success is not just profit, but the positive legacy we leave for future generations.
天然气将在向低碳未来过渡的过程中扮演关键的桥梁燃料角色。
A shortage is a sign that somebody is keeping the price artificially lower than it would be if supply and demand were allowed to operate freely.
网球是一项心理游戏。每个人都健康，每个人都打出很棒的正手和反手——重要的是头脑。
我相信我们都是自己的墓地；我们蹲伏在自己过去的坟墓之间。
A long habit of not thinking a thing wrong gives it a superficial appearance of being right.
A novel is not just a story, but a mirror reflecting the complexities of human nature.