This spinning motion, at speeds of hundreds of kilometers per second, may cause matter in the disk to take on a spiral shape.
这种以每秒数百公里的速度旋转的运动，可能会使圆盘上的物质呈现出螺旋形状。
Red blood cells are roughly the shape of a disk.
红细胞大致呈圆盘状。
Time to do the Disk Tray, trace its shape using the Pen Tool as illustrated in the image below.
现在是时候制作光盘托盘了，参照下图使用钢笔工具描绘其形状。
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