duty

/ˈduti/

the social force that binds you to the courses of action demanded by that force; ; - John D.Rockefeller Jr

Chinese meaning: 责任；义务；职责

It is the duty of every citizen to obey the laws of the country.

遵守国家法律是每个公民的义务。

The security guard was on duty all night to ensure the building's safety.

保安整夜值班以确保大楼安全。