spiral stair

基本解釋

All of them have separate entrances but are connected by a central spiral stair.
他們分別設置不同的出入口，并通過中部的旋轉樓梯加以聯(lián)系。
Floor plates are easy to navigate with a spiral stair connecting the upper and lower levels.
旋轉樓梯連接上下層，便于在樓層之間通行。
Reaching the spiral stair, he raised his eyes absently to the next level and was distracted at once. His own face was looking back at him from the ceiling of the room above.
走到螺旋形樓梯時，他心不在焉地抬眼朝樓上看了看，突然被吸引住了，他自己的面孔正從上層的天花板上朝他看著。