smirch

英

美

v.  弄脏; 污蔑; 诋毁
n.  污点; 污斑; 性格缺点

过去式：smirched　现在分词：smirching　第三人称单数：smirches　过去分词：smirched　

GRE

双语例句

• 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。
• Study of reducing compound material's drilling smirch
  减少复合材料钻孔污斑的研究