Respectively from the perspectives of form and content, professional institutions and professional qualities indicate the irreplaceable nature of social occupations.

职业制度和职业素养分别从形式和内容表征着社会职业的不可替代性。

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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。

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The occupations were grouped into six categories of careers -- realistic, investigative, artistic, social, enterprising and conventional.

这些职业被分成六个类别-分别是现实类，调查类，艺术类，社会类，商业类和传统类型。

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For many professional and managerial careers, that begins with LinkedIn, as it is the leading social network geared toward people in professional occupations.

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