The red cells have a spherical rather than the biconcave-disk shape of the normal red cell.

红血球呈现球状，而不是正常细胞的双凹圆盘状。

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。