subtractive
adjective uk/səbˈtræk.tɪv/ us/səbˈtræk.tɪv/
mathematics specialized 减法的
relating to subtraction (= the process of removing one number from another)
The subtractive equation property states that the two sides of an equation remain equal if the same number is subtracted from each side. 减法方程式属性规定，如从等式两边减去相同的数字，则等式两边保持相等。
formal削减的
involving taking something away
Milling machines carve parts in a subtractive process from a blank. 铣床采用切削工艺从坯料中铣出零件。
Medicine is subtractive in that you need to subtract out anything that is irrelevant until you can isolate the one thing left that works. 医学采用的是排减法，因为你需要减去任何不相关的东西，直到你能分离出剩下的一件有效的东西。
formal减少的|削弱的
getting less by being combined, or getting less over time
Interference is a phenomenon in which two waves either have an additive or subtractive effect on each other's intensity. 干涉是两列波相互叠加或减少强度（振幅）的一种（物理）现象。
Compare: additivemultiplicative