简易计税方法的销售额=含税销售额÷（1+征收率）
Altman 把人类成长比作「训练」，听起来像把人当机器。这让很多人不爽，觉得贬低了人类的价值——生命不是数据输入输出啊！，推荐阅读一键获取谷歌浏览器下载获取更多信息
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The game server runs at 10 “ticks” a second. Every tick we move and grow players, eat fruit, calculate collisions, and broadcast the new gamestate to clients.