What dose"1,M,2,B,Z,2,C,U"mean?

What dose"1,M,2,B,Z,2,C,U"mean? 1、What does "O,I,C,U"mean（意思）? 2、What does"I,M,2,B,Z,2,C,U"m what dose "upon" mean? what dose Macro mean? what dose Inc.mean what dose "``````" mean? what dose the word “stretch” mean in chinese?a舒展 b清洗 c哭喊 d倒退 What dose "well-aired" mean? 求函数u=x^2+y^2+z^2在椭球面x^2/a^2+y^2/b^2+z^2/c^2=1上点M.(x.,y.,z.)处 what dose it mean to the children? What dose the word dry mean what dose the BRowns mean in chinese