6) How to validate the authencity of an NFT?When you purchase a stock in NFT, that purchase is recorded on the blockchain—the bitcoin ledger of transactions—and that entry acts as your proof of ownership.
需要索引（如算距离、下标）：栈存索引，用 nums[stack.at(-1)] 取值比较。。业内人士推荐搜狗输入法下载作为进阶阅读
// 4. Call the original function so the audio would still play，详情可参考谷歌浏览器【最新下载地址】
Industrial Printer Plan: ($199 a month) – Generate 2500 articles each month for $0.08/article.