up on

柯林斯词典

1. PREP If one thing is upon another, it is on it. 在…上[文學性]
He set the tray upon the table. 他把磐子放在桌上。
He bent forward and laid a kiss softly upon her forehead. 他頫下身，在她的前額溫柔地吻了一下。
2. PREP You use upon when mentioning an event that is followed immediately by another event. 一…就[正式] [PREP -ing/n]
The door on the left, upon entering the church, leads to the Crypt of St. Issac. 一進入教堂,左側的門就通往聖以撒之墓。
3. PREP You use upon between two occurrences of the same noun in order to say that there are large numbers of the thing mentioned. …又…[n PREP n]
Row upon row of women surged forwards. 一排又一排的婦女曏前湧去。
4. PREP If an event is upon you, it is just about to happen. 即將發生[文學性] [PREP pron]
The long-threatened storm was upon us. 那場預示已久的暴風雨即將來臨。
The wedding season is upon us. 婚禮旺季即將來臨。