step in intransitive verb ① (intervene) 介入 jièrù ▸ a local businessman stepped in with a large donation for the school 当地一位商人出面捐了一大笔钱给学校 ▸ the coach was forced to step in to stop the two athletes from coming to blows 教练被迫出面干预,阻止这两名运动员斗殴 ② (act as substitute) 代替 dàitì ▸ thanks for stepping in when David became ill 谢谢你在戴维生病期间接替他 |