回眸一笑：looking back at someon with a smile(usually it is uesed to describe women) 擦肩而过：to brush against someone eg. I passed her in the street twice last week. 无所不谈：Talking about everything with someone, usually it describes an intimate relationship(like friends) 下不为例：It is like a kind of order—— it can not happen next time 惴惴不安：be anxious and fearful