1. 沾污：飞溅物 splash | 沾污 smirch | 油污 oil stain

2. 污斑;玷污：smile response 微笑响应 | smirch 污斑;玷污 | Smith chart 史密斯圆图

3. 沾污 污迹：Soft X-rays 软X射线 | smirch 沾污 污迹 | smooth file 细锉

4. 沾污/弄脏/脏污/污点：smilingly /微笑地/[风景] 明媚地/冁/粲/ | smirch /沾污/弄脏/脏污/污点/ | smirk /傻笑/装出不自然的笑/

noun

1. an act that brings discredit to the person who does it

e.g. he made a huge blot on his copybook

Synonym: blotsmearspotstain

2. a blemish made by dirt

e.g. he had a smudge on his cheek

Synonym: smudgespotblotdaubsmearslur