什么叫四则混合运算定律

简介：How many years have passed? The last time the Ming Dynasty faced a great victory over Jianlu was at Ningyuan in the Year of the Apocalypse. Since Emperor Chongzhen ascended the throne, there has not been a major victory. The Liaodong battle reports received every day are either asking for money, food or reinforcements. If it weren't for the news of the defeat, Emperor Chongzhen would have suffered from Liaodong war report phobia.