sub·tract /səbˈtrækt/
(vt.)減去,扣掉,減少(vi.)作減法
subtract
減
Sub·tract v. t. [imp. & p. p. Subtracted; p. pr. & vb. n. Subtracting.] To withdraw, or take away, as a part from the whole; to deduct; as, subtract 5 from 9, and the remainder is 4.
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subtract
v : make a subtraction [syn: deduct, take off] [ant: add]