step in
phrasal verbstep in
- to help somebody in a difficult situation or an argument
施以援手；居间调停 - 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 team coach was forced to step in to stop the two athletes from coming to blows.
运动队教练不得不介入，才使两个运动员没有动起手来。
- A local businessman stepped in with a large donation for the school.