uponKK [əˋpɑn] /əˈpɑn/介系詞1在……之上、在……上面正式A thin layer of dust had settled upon the old piano.一層薄薄的灰塵積在那台舊鋼琴上。2一……就、當……之際正式Upon hearing the news, she immediately called her family.一聽到這個消息,她立刻打電話給家人。3對、針對、就多與特定動詞連用The whole plan depends upon the weather next week.整個計畫要看下週的天氣而定。4即將來臨、逼近用於 be upon someoneThe deadline is upon us, so let's focus.截止期限就在眼前了,我們專心一點。5接連、一個又一個用於重複同一名詞We drove past mile upon mile of empty farmland.我們開車經過一望無際的空曠農地。