任务的近义词、同义词

the social force that binds you to the courses of action demanded by that force; "we must instill a sense of duty in our children"; "every right implies a responsibility; every opportunity, an obligation; every possession, a duty"- John D.Rockefeller Jr

any piece of work that is undertaken or attempted; "he prepared for great undertakings"

an actor's portrayal of someone in a play; "she played the part of Desdemona"