A preface; something done to prepare the way for something more important.

序言；(事件的)前奏。

Esp. a short piece of music serving as an introduction.

【乐】序曲；前奏曲。

To introduce.

以...开始；导引。

To play an introduction to.

【乐】奏...的序曲。

To play a prelude.

【乐】奏序曲。