然而，在美国社会，阶级结构没有那么严格；有些人很轻易地就改变了职业，并认为提高他们的社会和经济地位是他们自己的责任。

In American society, however, the class structure was less rigid; some people changed occupations easily and believed it was their duty to improve their social and economic position.

youdao

然而，在美国社会，阶级结构没有那么严格；有些人很轻易地就改变了职业，并认为提高他们的社会和经济地位是他们自己的责任。

In American society, however, the class structure was less rigid; some people changed occupations easily and believed it was their duty to improve their social and economic position.

youdao