wear one's heart on one's sleeve 十分坦率 ，坦诚，表露感情

　　She always wears her heart on her sleeve, everyone knows what's on her mind.

　　她对感情从不掩饰，每个人都知道她在想什么。

　　It's easy to get hurt, if you wear your heart on your sleeve.

　　过于坦白自己的感情，难免让你受伤。

　　疯狂练习吧！