any of various plants of the genus Sempervivum native to the Old World,especially S. tectorum,having a persistent,basal rosette of fleshy leaves and a branching cluster of pinkish or purplish flowers是什么意思_any of various plants of the genus Sempervivum native to the Old World,especially S. tectorum,having a persistent,basal rosette of fleshy leaves and a branching cluster of pinkish or purplish flowers在线翻译_英语_读音_用法_例句