By cell/cell contact, I mean that there's a receptor in one cell that makes some kind of a chemical interaction with a receptor in another cell.

通过细胞之间的接触,我的意思是在一种细胞上的受体,能与另一细胞上的受体发生某种化学反应

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However that may be, no question about it, there was contact, interaction,and influence.

不论怎样,毫无疑问,这些文明相互交流,相互作用,相互影响

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