组细胞随培养时间的延长细胞呈多层生长，不发生接触抑制现象。
The cells in the Group a grew with many layers along with the prolongation of the culture time without contacted inhibition.
组细胞随培养时间的延长细胞呈多层生长，不发生接触抑制现象。
The cells in the Group a grew with many layers along with the prolongation of the culture time without contacted inhibition.
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