smirch
vt. <正>弄髒,玷汙,汙辱
1. a blemish made by dirt;
2. an act that brings discredit to the person who does it;
1. smear so as to make dirty or stained
2. charge falsely or with malicious intent; attack the good name and reputation of someone;
The compound material of resin matrix may produce serious smirch phenomenon during the minute hole drilling.
以樹脂為基體的複合材料在微孔加工中會產生嚴重汙斑現象.