It was a pretty astute deduction. [+ about]

那是一个颇为敏锐的推论。

My mother had consequently made her own shrewd deductions about what was going on in my marriage.

我母亲已据此对我的婚姻状况作出了她自己精明的推断。

...a case that tested his powers of deduction.

考验他的推论能力的案例

...your gross income (before tax and National Insurance deductions).

(扣除税款和国民保险之前的)总收入

After deductions for war reparations, the balance would be used to buy food and humanitarian supplies.

扣除战争赔款后，余下的钱将用于购买食品和人道主义物资。

After the deduction of tax at 20 per cent, the interest rate will be 6.2 per cent.

扣除了 20% 的税后，利率将为 6.2%。