The difficulty lies in the fact that you're saving the data to a local file, which means it's not the original server.
难点在于事实上我们把数据保存在本地文件中，而不是初始服务器上。
The local variable storage area is a general-purpose area for saving function-specific data.
本地变量存储区是用来保存函数专用数据的通用区域。
The local variable storage area is a general-purpose area for saving function-specific data.
本地变量存储区是用来保存函数专用数据的通用区域。
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