•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 (= form answers by thinking carefully about) the available facts.我们只能根据目前掌握的情况作出各种推论。

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•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。

•After deductions (= expenses on which tax does not have to be paid) , his taxable income is $30,000.扣除免税项目后，他的应税收入为三万美元。