Offset
来自Big Physics
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wiktionary
From off- + set, used to construct the noun form of the verb to set off.
etymonline
offset (n.)
1550s, "act of setting off" (on a journey, etc.), from off + set (adj.). Meaning "something 'set off' against something else, a counterbalance" is from 1769; the verb in this sense is from 1792. As a type of printing, in which the inked impression is first made on a rubber roller then transferred to paper, it is recorded from 1906.
