公式： f(x)=max(0,x)
如果说，有一样食物“南北通吃”，还能变出上千种吃法——毫无疑问，那就是小麦。
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The value of an NFT comes from its ability to be traded freely and securely on the blockchain, which is not possible with other current digital ownership solutionsThe NFT points to its location on the blockchain, but doesn’t necessarily contain the digital property. For example, if you replace one bitcoin with another, you will still have the same thing. If you buy a non-fungible item, such as a movie ticket, it is impossible to replace it with any other movie ticket because each ticket is unique to a specific time and place.，这一点在快连下载-Letsvpn下载中也有详细论述