duty, obligation, responsibility

　　duty n.指道義上的責(zé)任，強調(diào)自覺性，作可數(shù)名詞時指本職工作的任務(wù)。

　　His duty is to see that the business runs well.他的職責(zé)是保證生意良好運轉(zhuǎn)。

　　obligation n.指合同或法律上規(guī)定的責(zé)任，義務(wù)，強調(diào)其約束力。

　　Parents have a legal obligation to ensure that their children are provided with efficient education suitable to their age.父母有法律上的義務(wù)確保其子女受到適合其年齡的有效教育。

　　responsibility n.職責(zé)，強調(diào)對后果要負責(zé)任的意思。

　　His father is ill, and he has the responsibility of caring for him.他的父親病了，他有責(zé)任照顧他。