preludes
n. 開端( prelude的名詞複數 ); 序幕; 序曲; 短篇作品
You can describe an event as a prelude to a more important event when it happens before it and acts as an introduction to it.
Most unions see privatisation as an inevitable prelude to job losses...
大多數工會認為私有化會不可避免地導致失業。
The conference, which closed yesterday, was a prelude to a Communist Party Central Committee meeting.
昨天結束的會議拉開了共產黨中央委員會會議的序幕。
A prelude is a short piece of music for the piano or organ.
...the famous E minor prelude of Chopin.
肖邦著名的E小調前奏曲