First of all, having read in that value, I can check to see, is it of the right type?
首先,读一下这个值,我们可以来检查看看是不是正确的类型?
So if this is true do something else, true otherwise test and see if this is true, do something else, as many as I like followed by the end.
因此如果结果为true那么做一些操作,否则的话再看看这个表达式的值是不是,如果是的话做另外一些操作,我想要多少后面就可以跟多少。
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