单词 subset 释义 ▪ I. subset, n.1[f. subset v.]An act of subsetting or subletting.a1722,1765–8[see subsetting below].▪ II. subset, n.2[f. sub- 5 c + set n.2]A subordinate set; a set all the elements of which are contained in another set.1902Encycl. Br...