每一本书都是一扇通往未知世界的门，一次探索未知的邀请。

The saddest thing about love is that not only that it cannot last forever, but that heartbreak is soon forgotten.

愉快是健康的最佳促进者。

The only way to do something in depth is to work hard.

规模不等于价值，精准才是关键。