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smirch的第三人称单数（三单）为：smirches...
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smirch的一般过去时为：smirched...
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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....
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smirch的现在进行时为：smirching...
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smirch的现在完成时为：smirched...
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vt.弄脏，玷污，污辱...