friction:摩擦, 摩擦力, 分歧r e.g. My daughter and son always have frictions. r conflict:冲突, 战斗, 矛盾, 斗争 r e.g.If so, your points of view are bound to conflict with his.r 摩擦和冲突之间差别很大r 好比战斗和战役，规模大小把握一下就好r friction累积矛盾能成为conflict
水利万物而不争,
而万物莫能与之争。
