If the return value from the code is false, the submittion is cancelled.
如果该代码的返回值错误，就会取消提交。
So same code up here — thankful is initialized to false.
所以这里的同样的代码——thankful被初始化为false值。
Once the scan code after the pop-up payment interface, it must be false.
一旦扫码后弹出付款界面，肯定是假的。
True or False: Billy Hunter thinks that the NBA dress code is a good thing.
呈非题：比利·亨特认为NBA颁“布服装令”是个好事情。
True or False: Billy Hunter thinks that the NBA dress code is a good thing.
呈非题：比利·亨特认为NBA颁“布服装令”是个好事情。
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