accidentKK: []DJ: []n.1. 事故;灾祸[C]He died in an automobile accident years ago.他数年前死于车祸。2. 意外事情;偶然因素,机遇[C][U]The discovery was a happy accident.这一发现出人意料,令人高兴。我们的学校比以前更美了---Our school ___ ___ ___ beautiful ___ beforeOur school become more beautiful than before.