The state has a duty to protect its citizens against external enemies.

国家有义务保护本国公民不受外敌侵犯。

《牛津词典》

We demand that the State shall make it its primary duty to provide a livelihood for its citizens.

第七条，我们要求，国家的首要义务应该是为其公民提供生活。

youdao

If children who are minors cause damage to the state, the collective, or individuals, their parents shall have the duty to bear civil liability.

在未成年子女对国家、集体或他人造成损害时，父母有承担民事责任的义务。

youdao

This Court is more than willing to see two loving hearts reunite, but it is the duty of the Court to protect the morals of the State.

VOA: special.2009.11.14

"I believe the state has a duty to provide services for citizens on an equal basis, and at the same time, the state has a duty to protect the rights of churches to define and practice their own beliefs, " he said.

BBC: Ford compares gay marriage debate to civil rights campaign

There are 43, 000 military reservists in Ohio counting the National Guard, which when added to the active-duty personnel stationed in the state adds up to a total of 51, 000 warfighters.

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The amendment, tabled by psychiatrist and crossbench peer Baroness Hollins, called for the words to be inserted into a clause about the duty of the secretary of state, the NHS Commissioning Board and clinical commissioning groups to improve the quality of services.

BBC: Archbishop calls for NHS bill to cover spiritual health