英语词汇“be upon one's guard”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	be upon one's guard
释义	be upon one's guard 警惕；提防；警戒
随便看	non linear dynamics non-linear dynamics nonlinear dynamics analysis non-linear dynamics and language research nonlinear dynamics characteristic non-linear dynamic signal nonlinear dynamics model non-linear dynamics model nonlinear dynamics of elastic bodies non-linear dynamics pattern nonlinear dynamics system non-linear dynamic stability nonlinear dynamic stiffness nonlinear dynamic system nonlinear dynamic system identification nonlinear dynamic systems non-linear dynamic systems nonlinear dynamic theory nonlinear dynamic time-history analysis non-linear dynamic time-history analysis nonlinear earth pressure non-linear earth pressure non-linear earthquake reaction nonlinear earthquake response nonlinear earthquake response analysis