n.扣除；扣除额；推论；推理；演绎

Net salary is gross salary minus tax and national insurance deduction. 净工资是工资总额减去税收和扣除国民保险。

The deduction of a payment is made by a debtor from an amount due. 贷款扣除额由欠债人从应付数目中的付款扣除。

The deduction is not a tax per se, but it's a charitable contribution that the company takes out of your paycheck. 这个扣除额不是所谓的税，但也算公司从你的薪水中扣除的公益捐款。

Her deduction that he was now dead was correct. 她作出的他此时已经死亡的推论是正确的。

Your deduction is definitely unreasonable. 你的推论无疑是不合理的。

He arrived at the solution by a simple process of deduction. 他通过一番简单的推理得出了解决问题的方法。