N-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.
例句
...the leap forward in communication made possible by the advent of the mobile phone.
手机的问世带来了通讯业的迅猛发展
The advent of war led to a greater austerity.
战争的到来使形势更为严峻。