SMabbr.(=master of science;sergeant major;service mark;stage manager;stationmaster;small) 理学学士;士兵勋章;舞台策划;小的
SMZ[化] 磺胺甲基┭唑; 磺胺甲基异┭唑; 新诺明
"he had a smudge on his cheek"
"he made a huge blot on his copybook"
"The journalists have defamed me!""The article in the paper sullied my reputation"