deduction
noun uk/dɪˈdʌk.ʃən/ us/dɪˈdʌk.ʃən/
(THINKING)
C2 [ C or U ]（根据已知的事实所作出的）推断，推论;推论所促成的决定
the process of reaching a decision or answer by thinking about the known facts, or the decision that is reached
Through a process of deduction, the detectives discovered the identity of the killer. 经过一番仔细推断，警探们搞清了杀手的身份。
All we can do is make deductions from the available facts. 我们只能根据目前掌握的情况作出各种推论。
(TAKING AWAY)
C1 [ C or U ]减法;扣除
the calculation of taking an amount or a part of something away from a total or the amount that is taken away
The interest I receive on my savings account is paid after the deduction of tax. 付给我的存款利息已经扣了税。
[ C ] US and Australian English (UK stoppage)扣除额；减免额
an amount that is taken away from the money you are paid before you officially receive it
After deductions, his taxable income is $30,000. 除掉免税项目后，他的应税收入为3万美元。