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

耶鲁公开课 - 生物医学工程探索课程节选

The answer is, "It's not like anything," where that doesn't mean there's something that it's like to be a cell phone, but different from being anything else.

答案就是，什么感觉都不像“,那不是说,作为手机真的有一种感觉，只是和作为其他东西的感觉。

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What does that mean to have the stem cell character?

拥有干细胞特征的细胞是什么意思

耶鲁公开课 - 生物医学工程探索课程节选