一转身，就不知道谁会消失。

The world is such small,it's like when you turn around,you don't know who you will see. The world is so big,as if when you turn around,you never know who will disappear.-----世界真的很小，好像一转身，就不知道会遇见谁；世界真的很大，好像一转身，就不知道谁会消失。