For readers, when they see "there is a poem (or poems) outside", they know that there are other poems besides the first one; After reading the second song, I didn't see the author's name, but I also knew it was the author of the first song.
Extended data
origin
In ancient times, when information technology was underdeveloped, it was very inconvenient for people to transmit information from one area to another, so they compiled the written poems into songs and the poems came from people's mouths. Poetry originated from ancient social life, which is a rhythmic and emotional language form due to labor production, sex and primitive religion.
Poetry is the lyrics. In actual performances, it is always sung with music and dance. Later, poetry, song, music and dance developed independently and became independent adults. Distinguish songs from poems by entering music or not. Music is a song, but poetry is not.
Poetry is a kind of language art, which is differentiated from songs, and songs are a kind of music literature with a long history. The Book of Songs is sung with music. Technically, it is a song. Because of this, The Book of Songs is regarded by scholars as a symbol of the maturity of China's music literature.
Poetry is the oldest and most literary style, which comes from ancient labor songs (later developed into folk songs) and sacrificial eulogy. Poetry used to be a general term for poetry and songs, and poetry combined with music and dance was called poetry.
China's poems have a long history and rich heritage, such as The Book of Songs, Songs of the South, Han Yuefu and the works of countless poets. European poetry originated from Homer and Sappho in ancient Greece, Virgil and Horace in ancient Rome.
Baidu encyclopedia-poetry