词汇	hierarchical file system
释义	hierarchical file system 分级文件系统
随便看	emergency rooms emergency room service emergency room thoracotomy Emergency room visit Emergency Roster emergency rotary converter emergency route emergency route release emergency routing emergency run emergency-run characteristic emergency rush engineering emergency rush engineering,emergency repairs emergency rush order emergency rush orders emergency safeguard emergency safeguard measures emergency safeguards system activation emergency safe switch emergency/safety/disciplinary procedures emergency safety evaluation emergency safety management emergency safing circuit emergency salvage gear emergency sand box