The teacher called Dabao to step up the platform.老师叫大宝走上讲台.He urged donors to step up their efforts to send aid to Somalia.他敦促各捐赠方加快速度将援助物资送往索马里。The meeting ended with a pledge to step up cooperation between the six stat...

走上，（使）增加，（使）加快速度，走上前去...

step up的音标：step up的英式发音音标为：[step ʌp]step up的美式发音音标为：[stɛp ʌp]...