The United States will do that which is necessary to meet its obligations to its own citizens.

美国会尽其对国民应尽的义务。

《柯林斯英汉双解大词典》

Some laws also stipulate in explicit terms that Chinese citizens have obligations to take care of parents and raise children.

一些法律也明确规定中国公民有义务赡养父母、抚养子女。

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Merchants and citizens struggled to fulfil their obligations with unwieldy piles of metal.

商人和市民们气喘吁吁地拖着沉重的一大堆金属来履行买卖双方的义务。

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Citizens' economic rights, responsibilities and expectations and the state's obligations and purpose must adapt to new world realities.

CNN: After the bailout, Spain needs to rise to the challenge

Some Americans don't see us as having basic obligations to our fellow citizens.

BBC: What happened to America's community spirit?