Because of its jog-trot rhythm , pure anapestic metre was originally used only in light or popular english verse , but after the 18th century it appeared in serious poetry .

因为，仄仄平节奏缓慢，纯仄仄平音步原本只用于通俗英语韵文，但是十八世纪后，才出现于严肃诗。