social class structure

From then on, the ancient Chinese social class structure began to change from hierarchy standard to wealth standard.

由此，中国古代社会的阶层结构出现转型，由身份等级制向以财富为标准的贫富转化。

Nowadays, the shape of China social class structure looks like a pear, yet, there exists an intendance to turn to the pyramid-like social class structure shape.

现阶段中国社会阶层结构形态呈生梨型，它存在着向金字塔社会阶层结构形态演变的趋势。

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.

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。