1. being mixed with extraneous material. 
   混入其他物质的状态。
2. having extraneous everything removed including contents. 
   所有外来的东西都被去除了，包括内容。
3. the adulterating effect of extraneous materials. 
   其他物质掺杂的结果。
4. To remove extraneous matter from(the teeth). 
   剔除从（牙上）剔除外来物质
5. Insurance against extraneous risks, insurance against additional risks 
   附加险

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• 1. 額外費用
  extraneous earnings 額外盈餘...extraneous expenses 額外費用...extraneous income 額外收益
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• 2. 额外费用
  额外盈余 extraneous earnings...额外费用 extraneous expenses...额外收益 extraneous income
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• 3. 额外支出
  防务支出defence spending~defense spending...额外支出1.extraneous expenses
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