9个数字选3个有多少种组合简介：The three of them walked up a mountain climbing road. There were many pedestrians along the way. Although the road was not narrow, it was almost crowded. Most of them were women, so Li Chu was frequently looked at.
The three of them walked up a mountain climbing road. There were many pedestrians along the way. Although the road was not narrow, it was almost crowded. Most of them were women, so Li Chu was frequently looked at.
