英语词汇“triangular numbers”的读音、翻译、释义、用法及例句-布网

词汇	triangular numbers
释义	triangular numbers n. pl.（复数名词 plural noun）【数】三角形数（正三角形内排列的数,即以自然数为项的串行直至第 n 项的和: 1,3,6,10,15,…）
随便看	ground staff ground state ground-strafe ground stroke ground substance ground swell ground tackle ground thrush ground-to-air ground-to-ground ground truth groundwater groundwater level ground wave ground wire Glyptal glyptic glyptics glyptodont glyptograph glyptography G & M G.M. gm. G-man

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