永久通信地址 permanent mailing address相关短语 permanent memory permanent storage 永久性存储器 permanent axis 恒轴线 permanent change 永久变形 permanent character 永久特性 permanent emplacement 固定炮位 permanent heterozygote 永久杂合体 permanent post 永久性兵营 permanent press n.免烫 permanent root 永久根 ...