It is our bounden duty to help the disabled.

帮助残疾人是我们义不容辞的责任.

《现代汉英综合大词典》

It's the teacher's bounden duty to help his students.

帮助学生是老师应尽的责任.

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Imparting knowledge and educating people is the teacher bounden duty.

教书育人是教师的天职.

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Developing rural education is the bounden duty of China as a large agricultural country.

我国是农业大国,发展农村教育义不容辞.

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