uponprep.在 ... 上;紧接着;逼近
upon the listen注意地听着
upon on a pinchadj.在紧要关头(在危急时;必要时)
upon their legsvi.站着(能起来走动;发达的)
upon reflection再考虑后
upon that whichadj.于是(接着)
upon one's word学科馆员
upon at a pinchadj.在紧要关头(在危急时;必要时)
upon one's legs学科交叉
upon compulsionadj.被迫地