upon
🇺🇸
/əˈpɑːn/
🇬🇧
/əˈpɒn/
preposition
B1
on or at a particular time or event
The decision was made upon receiving the final report.
在收到最终报告后，做出了决定。
R
used to show a very large number or amount of something
There were thousands upon thousands of stars visible upon looking at the night sky.
仰望夜空时，可以看到成千上万的星星。
translation
在某个特定时间或事件时, 大量的