impulsen.冲动;心血来潮;神经冲动;[物]冲量;[电]脉冲vt.推动
impudentadj.无礼的;鲁莽的;卑鄙的
impugnableadj.可责难的;可评击的
impugnmentn.责难;攻击
impugnationn.(=impugnment)指摘;攻击
impugnabilityn.责难
impugn a statement驳斥一种言论
impugn a piece of evidence[法] 对某一证据的怀疑
Impugn a political opponent's record.反图像争辩