permutability [pə:mjutə'biliti] n. 换排性(可置换性) 例句与用法: Do you want a perm like you have last time? 您要不要?上次一样烫头发? Her hair has been permed. 她的头发烫过了。 词形变化: 动词过去式: permed | 动词过去分词: permed | 动词现在分词: perming | 动词第三人称单数: perms |