本文以诗可以怨为范本，并对《琵琶行》进行悲怨美的结构分析。
It models on that poems can complain , and gives a sorrowful but beautiful structural analysis for it .
一句诗文可以使人记起整首诗。“诗可以怨”诗学思想的形成及演变
A single verse may bring a whole poem back to mind
诗可以怨