If you think about receptor ligand system as an input into the cell.
如果将受体-配体系统看作,细胞的一种输入机制的话
We own our own phone number, that allows you to input key strokes like you would any system and this is an example of what we call CS50 Voice.
我们都有电话号码,这就让我们可以输入任意的数字,然后这是CS50,Voice的一个例子。
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