uponKK [əˋpɑn] /əˈpɑn/发音介系词1在……之上、在……上面正式A thin layer of dust had settled upon the old piano.一层薄薄的灰尘积在那台旧钢琴上。2一……就、当……之际正式Upon hearing the news, she immediately called her family.一听到这个消息,她立刻打电话给家人。3对、针对、就多与特定动词连用The whole plan depends upon the weather next week.整个计划要看下周的天气而定。4即将来临、逼近用于 be upon someoneThe deadline is upon us, so let's focus.截止期限就在眼前了,我们专心一点。5接连、一个又一个用于重复同一名词We drove past mile upon mile of empty farmland.我们开车经过一望无际的空旷农地。用这个字练口说→