Recently, Xi'an is relatively hot, I can't sleep without turning on the air conditioner, and I have a cold directly after driving it all night, and my nose is direct, and my throat is more painful, and the state is not right. In fact, the jet lag is approaching these days. Please take a day off and rest early, please forgive me.

"Military Science and Technology" takes a day off and is in the middle of the hand, please wait a while,

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