Because a rotating joint is essential to a wheel a wheel made of living cells would twist its artery vein and nerve connections at the first revolution making living impracticable .

因为一个旋转的接头对轮子来说是至关重要的，由活的 细胞构成的 轮子在第一次转动时便会扭伤其上的动脉和神经的连结，因而不现实。

The researchers showed that a device with a number of these channels leading to a central reservoir like spokes on a wheel worked just as well separating cancer and non-cancerous cells .

研究者们展示了包含许多这样的通道的装置，这些通道最终汇集于一个中心贮存器，就像 车轮的辐条，以分离癌细胞和正常 细胞。