单词	spiral stairway
释义	spiral stairway 螺旋形楼梯
随便看	operating switches operating switches using spring motor operating synergism operating systcm operating system-management operating system manual operating system master operating system microprogram operating system model operating system operating-system operating system/2 operating system/2, OS/2 operating system access method operating system address space operating system algorithm operating system architecture operating system camouflage operating system characteristic operating system characteristics operating system coexistence operating system command Operating-system command or executable program operating system component operating system configuration