extrapolation/ɪkˌstræpəˈleɪʃn; ɪk`stræpəˌleʃən/ n[U]~ (from sth) (fml 文) He estimated his income tax bill by extrapolation from figures submitted in previous years. 他从前几年的报税数字推算出自己应缴的所得税数额. =>illus at chart见chart之插图.
牛津英汉双解词典