They have a case against their directors for breach of fiduciary duty.

他们对董事们违反信托责任提出诉讼。

《柯林斯英汉双解大词典》

We have a duty to care for the refugees.

我们有义务关怀这些难民。

《牛津词典》

If I might have a right, do you have a duty to fulfill that for me?

如果我有权利，你有义务为我实现它吗？

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Some others If I might have a right to X, do you have a duty to fulfill that for me?

其他的像如果我有某项权利，你有没有义务帮我实现？

普林斯顿公开课 - 人性课程节选

because you read the Bill of Rights, for example, The Declaration of Independence, citizens have a duty to put a new government if it is not serving well the people.

举个例子，如果你读《人权法案》,或者《独立宣言》,如果政府不够尽责,公民有权支持一个新的政府。

麻省理工公开课 - 媒体、教育、市场课程节选

If they are regulated by the Financial Industry Regulatory Authority, or FINRA, they also have a suitability duty for their stock tips.

FORBES: Is Your Financial Advisor A Wolf In Sheep's Clothing?

If they are affiliated with a registered investment advisor, however, they have a fiduciary duty for their investment advice and if they personally manage your portfolio.

FORBES: Is Your Financial Advisor A Wolf In Sheep's Clothing?

Income was largely from local authorities who have a duty to pay for such care for local residents.

FORBES: Southern Cross: Solved