uponprep.在 ... 上;紧接着;逼近
upon the tapis在审议中
upon sufferance经默许
upon your honoradj.以名誉担保
upon receipt of一俟收到
upon one's head文体研究
upon our mettleadj.奋发起来(鼓起勇气)
upon the momentadv.立刻(马上)
upon our honouradj.以名誉担保
upon his mettleadj.奋发起来(鼓起勇气)
upon invitation应邀