extrapolationn.
英 ek,stræpə'leɪʃən | 美 ɪk,stræpə'leʃən
中文n. [数] 外推法；推断
词根词源
extrapolation (n.)1867, noun of action from extrapolate by analogy of interpolation; original sense was "an inserting of intermediate terms in a mathematical series." Transferred sense of "drawing of a conclusion about the future based on present tendencies" is from 1889.
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