I am a cloud in the sky, and by chance，I cast my shadow on the ripple of your mind.Don’t be surprised, Nor even be in delight ,Soon my trace will be gone from sight.我是天空里的一片云，偶尔投影在你的波心。你不必讶异，更无须欢喜，在转瞬间消灭了踪影。——徐志摩《偶然》
