continuing for ever in the same way永久的,永恒的;长期的
They lived in perpetual fear of being discovered.他们长期生活在恐惧中,担心被发现。
He has hard, cold eyes and his mouth is set in a perpetual sneer.他双眼又凶又冷,嘴角总是挂着一丝蔑笑。
a perpetual student终生学习者
often repeated不断重复的;永无休止的
perpetual vandalism对公共财物不断的蓄意破坏