xi+yi

xi+yi 经济计量学证明∑xi=∑yi=0,其中xi=(Xi-X),yi=(Yi-Y) Xi'an Xin Yi chuba Jixiang Road ai yi xi de 如题 Xi'an Xin Yi scar removal wa ta xi mo a na da o a yi xi tie yi lu yo! lingo中怎样表示： xi,yi,zi=0或1, xi+yi+zi=1 huan lei yi ge dong xi jiu xiang huan lei yi ge ren yi yang! 中间有 a yi xi dai yi lu a yi xi dai yi lu 女声,声音很纯的 安静的歌 Yi ma wa a na da xi ka. 汉语拼音转韦氏音标lin yi xi改成韦氏音标 My heart,you yi xi is my only one.