In set theory, when dealing with sets of infinite size, the term almost or nearly is used to mean all the elements except for finitely many.
In other words, an infinite set S that is a subset of another infinite set L, is almostL if the subtracted set L\S is of finite size.
近义、反义、联想词
解析
almost 指在程度上相差很小,差不多。 nearly 与almost含义基本相同,侧重指数量、时间或空间上的接近。 about 常可分almost和nearly换用,但about用于表示时间、数量的“大约”时,实际数量可能多也可能少。 approximately 多用于书面语,指精确度接近某个标准以致误差可忽略不计。 around 多用于非正式场合,常见于美国英语。 roughly 指按精略估计,常代替about。