Originally, classical poetry conforming to a definite pattern is lyric literature used to express thoughts and emotions by composing music to the singing.

• 摘要词上表达思想感情的配乐演唱抒情文学，既要配乐，就要考虑字声的平、上、去、入与乐声的宫、商、角、徵、羽的协调契合。