duty-bound [ˈduti baʊnd]

例句:

• Blood was the substance that bound the kindred together.
  来自BBC
• We take very seriously our duty to pay tax.
  来自BBC
• Lots of police are on duty on the roads.
  来自VOA
• I felt duty bound to help.
  我觉得我有责任帮上一把。
  
• I felt duty-bound to help him.
  我觉得帮助他责无旁贷。
  
• Having witnessed the accident, I felt duty bound to make a statement to the police.
  由于我亲眼目睹了那次事故, 我觉得向警察汇报是义不容辞的.