英 [əˈpɒn] 美 [əˈpɑːn]
prep. 在……上；用在一些动词后，与 on 同义；一……即……，一……就……；（用于两个相同的名词之间，强调数量之多）（一个）接（一个），……又……；将要发生，马上来临
adv. 在上面地；此后
upon /əˈpɒn/ CET4 TEM4
介词 If one thing is upon another, it is on it. 在…上
He set the tray upon the table.
他把盘子放在桌上。
He bent forward and laid a kiss softly upon her forehead.
他俯下身，在她的前额温柔地吻了一下。
介词 You use upon when mentioning an event that is followed immediately by another event. 一…就
The door on the left, upon entering the church, leads to the Crypt of St. Issac.
一进入教堂,左侧的门就通往圣以撒之墓。
介词 You use upon between two occurrences of the same noun in order to say that there are large numbers of the thing mentioned. …又…
Row upon row of women surged forwards.
一排又一排的妇女向前涌去。
介词 If an event is upon you, it is just about to happen. 即将发生
The long-threatened storm was upon us.
那场预示已久的暴风雨即将来临。
The wedding season is upon us.
婚礼旺季即将来临。
根据；接近；在…之上
这款在AGF赛事声明(Statement)显赫、久经考验的发动机一经(Upon)配装吉利的商用车远景上，就成为了该车型(Model)的一大亮点，这也成为吉祥投身方程式赛事以来最大的收获。
... calloff放弃,取消 callon/upon访问,拜访;号召,呼吁 callup召集,动员;打电话;使人想起 ...
... 43）up在...上面，在...上。 44）upon在...之上，迫近...。 45）within在...之内。 ...
... surface 表面 upon 根据 principle 原理 ...
根据；接近；在…之上
on the basis of / in the light of / onto / toward / up
The wedding season is upon us.
婚礼旺季即将来临。
Her image is engraved upon my heart.
她的形象铭刻在我的心中。
How might the plans be improved upon?
这些计划还能怎么改进呢？
What could I do? I swung my chair and moved it upon the floor, but the noise continually increased.
VOA : special.2009.05.16
Like the moon, Satan may look beautiful, but upon a closer scrutiny that beauty begins to yield certain metaphysical flaws.
像月亮那样，撒旦看起来非常美好，但是近看,就会发现这份美丽开始显露出一些抽象的瑕疵。
弥尔顿课程节选 : 耶鲁公开课
C So, that's the breakdown. And, the grade is C level, 50% and it's based upon a performance of 50% absolute.
这些就是分类，分数是，那就是基于成绩的。
固态化学导论课程节选 : 麻省理工公开课
"The quality of mercy is not strain'd It droppeth as the gentle rain from heaven Upon the place beneath;
VOA : special.2011.06.06
She waved from our ships upon the briny foam And now they've about quit waving her back here at home.
VOA : special.2010.07.02
Photographers and travellers have to stumble upon each other in a bit of serendipity.
The book was translated into eight languages and HBO produced a documentary based upon it.
Upon independence from Britain the country was to be divided to create Pakistan, a Muslim nation.