step in phrasal verbphr v DO BADLYto become involved in an activity, discussion, or disagreement, sometimes in order to stop trouble 介入,干涉,插手 SYN intervene The military may step in if the crisis continues. 如果危机持续下去,军方可能会介入。
Parents have stepped in to provide homework help in the afternoon program. 在下午的活动中,家长们参与进来帮助完成课后作业。
→ step in at step2(PHRASAL VERB)