If the empty bracket pair is omitted, it is an error, but an error that the compiler is unlikely to catch; the program may fail at run time.

如果遗漏了空方括号对，这是一个编译器无法发现的错误，将导致程序在运行时出错。

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When electrifying at first time or using again after leaving unused for a long time, please run more 12 hours with empty container, and affirm that humidity has moved down to lower level.

第一次通电及长时间没使用后再次使用，请空箱运行12小时以上，并确认湿度下降到较低水平。

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