英语词汇“triangular numbers”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	triangular numbers
释义	triangular numbers noun plural : the successive sums n(n + 1)/2 where n = 1, 2, 3, ... of the first n natural numbers 1, 3, 6, 10, 15, … representable by dots arranged in triangles
随便看	neapolitan ointment neapolitan sixth Neapolitan Yellow neapolitan yellow neap rise neap tide near near nearabout nearabouts near-at-hand near beer nearby nearctic near eastern near-fall near hand near-infrared nearish near-legged nearly near miss near-miss near-money nearmost

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