前仰后合

Explanation: Body back and forth. Described was bending beneath laugh or sleepy look. 　　Usage: Joint type; as adverbial, complement; describe the way standing firm 　　Source: Yuan High Wenxiu "encounter Emperor" First off: "moved, after the former co-Yang, leave, this Jiuxing frenzied." 　　Examples: His story has not finished, the students had a smile ~. Thesaurus:  dilapidated, Former co- hypsokinesis, rock Antonym Group:  Stand up, Towering tower