义务 yìwù A. noun duty ▸ 履行义务 fulfil one’s duty ▸ 道义/法律上的义务 moral/legal obligation ▸ 纳税义务 duty bound to pay taxes ▸ 公民都有服兵役的义务。 Serving in the army is obligatory for all citizens. B. adjective voluntary ▸ 参加义务劳动 take part in voluntary labour ▸ 做义务家教 volunteer as a tutor |