Up to this point in literary history, only verse written for the theater had been written in unrhymed lines of iambic pentameter, in blank verse.

文学发展到那时候，只有为戏剧写的诗,才会用不押韵的抑扬格五音步，即无韵诗。

耶鲁公开课 - 弥尔顿课程节选