1N-UNCOUNT (重大事件、发明或情况的)出现,问世,到来The advent of an important event, invention, or situation is the fact of it starting or coming into existence. (重大事件、发明或情况的)出现,问世,到来 [formal]
...the leap forward in communication made possible by the advent of the mobile phone. [+ of]
N-UNCOUNT 降临节(在最靠近11月30日的星期日和圣诞节之间的节期) In the Christian church, Advent is the period between Advent Sunday, the Sunday closest to the 30th of November, and Christmas Day. 降临节(在最靠近11月30日的星期日和圣诞节之间的节期)