It means a duty owed by one person to anonther because of the relatioship between the two parties arising from the risk of injury. 准确来说,a duty of care 翻译成“有责任去履行,承担。。义务”在侵权法中,如果被告的疏忽( negligence),而造成原告的损失,则被告就有责任,义务去赔偿原告。that is to say, the defendent (被告)has a duty of care to the plaintiff(原告)