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

单词	direction numbers
释义	direction numbers direction numbers [di′rek·shən ‚nəm·bərz] (mathematics) Any three numbers proportional to the direction cosines of a line in space. Also known as direction ratios.
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