18、A relationship should be between two people, not the whole world.
爱情是两个人的事，与旁人无关。
19、You can’t have a better tomorrow if you don’t stop thinking about yesterday.
如果你无法忘掉昨天，就不会有一个更好的明天。
20、Today, give a stranger one of your smiles. It might be the only sunshine he sees all day.
今天，给一个陌生人送上你的微笑吧。很可能，这是他一天中见到的唯一的阳光。