1义务
英语:devoir, duty, incumbency, mortgage, obligation, onus, volunteer
法语:bénévole, obligatoire
德语:Pflicht, freiwillig, ehrenamtlich
俄语:долг, обязанность, обязательный
葡萄牙语:ônus, obrigatório, obrigação
西班牙语:cargo, deber, empeño, incumbencia, obligación
