单词	冰期孑遗
释义	冰期孑遗glacial relics
随便看	operational safety earthquake operational safety earthquake, sl-1 operational safety management system operational safety review operational scheduling operational self test operational semantics operational sequence operational sequence，os operational sequential diagram operational service period operational service state operational settings operational sign operational specification operational speed operational staff operational staff study operational stage operational standby program operational-stop instruction operational store operational strategy operational subsystem operational support