It is a legal obligation, but it is also a moral one.

这是一个法律责任，不过也是一个道德上的(责任)。

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Parents are under a legal obligation to educate their children.

家长负有教育自己子女的法律责任。

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In most European countries, parents have a legal obligation to ensure that their children receive proper education.

在欧洲的多数国家，父母有法律义务去保证他们的孩子接受适当的教育。

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Partly because China tosses back many would-be North Korean refugees, despite a legal obligation to help them.

ECONOMIST: North Korea: Bad guys | The

"We have a legal obligation to keep visitors safe and healthy, " he said.

BBC: Occupy London: St Paul's Cathedral closes due to demo

Dinh and Perkins thought that, on the contrary, he had a legal obligation to report what he knew to the S.E.

NEWYORKER: The Kona Files