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 mind主题词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