jnd大白算法在线测试简介：After a while, Mr. Bai walked out of the room with a smile on his face and a high-spirited look. Although his hair and beard were still white, the wrinkles on his face were obviously lighter, and he looked much more energetic.
After a while, Mr. Bai walked out of the room with a smile on his face and a high-spirited look. Although his hair and beard were still white, the wrinkles on his face were obviously lighter, and he looked much more energetic.
