劍橋詞典used to describe the most recent in a long series of things, when you do not know how many there are （經(jīng)過無數(shù)次後）又一次的，第 I glanced at my watch for the nth time that morning . 那天早晨我看了無數(shù)次表。 習(xí)語to the nth degree 返回 nth