数学中单双循环问题简介：Mahan was not polite. He drank a bowl and said with a swipe of his lips: Calculate the distance. If it takes four days if it is fast or seven days if it is slow, we will be able to meet the general's army.
Mahan was not polite. He drank a bowl and said with a swipe of his lips: Calculate the distance. If it takes four days if it is fast or seven days if it is slow, we will be able to meet the general's army.
