换现金、零钱

1. 强行进入；闯入
If someone breaks into a building, they get into it by force.

2. 突然开始做（某事）
If someone breaks into something they suddenly start doing it. For example if someone breaks into a run they suddenly start running, and if they break into song they suddenly start singing.

3. 成功打入，顺利进入（某行业，尤指很难取得成功的领域）
If you break into a profession or area of business, especially one that is difficult to succeed in, you manage to have some success in it.

1. change pace

e.g. The dancers broke into a cha-cha
The horse broke into a gallop

2. express or utter spontaneously

e.g. break into a yodel
break into a song
break into tears