which I just did there, -mystring in fact, let me type it in-- mystring, with an equal sign, which is saying, assign or bind to that name the value of the following expression.

也就是这里我做的，实际上，让我输入，然后是个蹬好，意思就是说，把这个名字绑定到,后面表达式的值上去。

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