(求助)提问 commercial, market, mutual, terms, money

suhuihui

请问LEVEL ONE book 2 里面的three  primary types of depository institutions,

commercial banks, the terms thrifts and thrift institutions , 和a money market mutual fund这三个有什么不同？

我怎么看commercial bank 和thrift institutions 的定义是一样的？

谢谢老师！