长龙单双怎么判断简介：Old Du frowned and said: Since it is a trap used by hunters in the mountains to catch wild beasts, it is very reasonable to have a mechanism to cover the top to prevent the prey from escaping.
Old Du frowned and said: Since it is a trap used by hunters in the mountains to catch wild beasts, it is very reasonable to have a mechanism to cover the top to prevent the prey from escaping.
