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。
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。
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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