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。

youdao

Position requires incumbent to design and implement best-in-class systems for patient monitoring and anesthesia delivery.

该职位要求为医用监护仪和麻醉系统设计出最好的系统，并付诸于实践。

youdao

Though in an awkward position, marketing manager, as a middle-class administer and executive in an enterprise, plays an important and key role and is the head of the whole marketing team.

营销主管，作为企业的中层管理者和执行者，虽然是个很尴尬的职位，但却是一个很重要的关键岗位，是整个营销团队的领头人。

youdao

We need to pass laws that enhance the recovery, enhance job creation, enhance middle-class security, and position this country for the kind of economic performance in the 21st century that the United States enjoyed in the 20th.

WHITEHOUSE: Press Briefing

And if the position is that the middle class ought to have its taxes go up and then get stuck again because of a refusal of Congress to do its job, that's just absolutely unacceptable.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

Martha has had to struggle to achieve and maintain her position as the mistress of her own first-class restaurant kitchen, and seems not to realize how much of her passion, goodness, and intellect she has poured into her work.

NEWYORKER: Mostly Martha