美[smə:tʃ] 1 . The compound material of resin matrix may produce serious smirch phenomenon during the minute hole drilling.
以树脂为基体的复合材料在微孔加工中会产生严重污斑现象.
来自互联网
1.a blemish made by dirt;
he had a smudge on his cheek
2.an act that brings discredit to the person who does it;
he made a huge blot on his copybook
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 journalists have defamed me! The article in the paper sullied my reputation
