（一）应税交易的购买方为自然人；
They migrate thousands of kilometres to find stable sea ice during Antarctic summer to wait out what is called a "catastrophic moult" every year.
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After more back-and-forth with design nitpicks and more features to add, the package is feature complete. However, it needs some more polish and a more unique design before I can release it, and I got sidetracked by something more impactful…，详情可参考谷歌浏览器【最新下载地址】
// console.log(spanner.next(85)); // 输出6（正确）