Another core obligation is the adoption and implementation of a national public health strategy and plan of action.

另一项核心义务是采取和实施国家公共卫生战略和行动计划。

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But public schools have an obligation to keep kids on track, leading to an allegedly cheaper kind of education: virtual summer school.

但是将孩子们扶上正轨是公立学校义不容辞的责任，由此，一种据说花费较少的教育方式——虚拟暑期学校应运而生。

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All of society has an obligation to attend public worship.

社会中所有的人都有义务要参加公众敬拜。

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We must support them, and this is both a public obligation and a personal responsibility.

CNN: Text of Bush's Notre Dame speech

Early in our history an incident involving one of the authors of the Constitution, Alexander Hamilton, shows clearly the bright line between, on the one hand, a private sexual scandal, and on the other, a public obligation--a line the president has intentionally crossed.

CNN: Sen. Gorton's closed-door impeachment statement

He suggested the government require services to be run under a public service obligation (PSO), similar to those which apply in Scotland, to avoid the prospect of the Isles of Scilly being "more or less cut off when the existing ships and infrastructure fail".

BBC: Peer appeals for 'lifeline' ferry service