deduct /diˈdʌkt/ vt. 1.扣除，减去：deduct losses from the total receipts 从总收入中减去损失的数额The teacher deducted ten marks for bad handwriting. 因书写不好，老师扣了10分。2.演绎，推论：He deducted from all the evidences that she had been murdered.根据所有的证据他推论出她是被谋杀的。
deduction /diˈdʌkʃən/ n. [u] 1. 扣除，减除；[c]扣除额：tax deductions扣税额 The dividend will be paid without deduction of tax.股息会免税发放。2. [u]推演，推理；[c]结论：His deduction led him to the correct conclusion.他的推断使他得出正确的结论。That seems a reasonable deduction.那似乎是合理的结论。
