upon

US /əˈpɑːn/

UK /əˈpɑːn/

在...上, 基於

more formal term for on, especially in abstract senses

•

The decision was based upon careful consideration.

該決定是基於仔細考慮而作出的。

•

He placed the book upon the table.

他把書放在桌子上。

一...就, 在...之後

indicating a time immediately or very soon after something

•

Upon arrival, please report to the front desk.

抵達後，請到前台報到。

•

He started crying upon hearing the news.

他一聽到這個消息就哭了。