单词	direction cosine
释义	direction cosine noun : any of the cosines of the three angles between a directed line in space and the positive direction of the axes of a rectangular Cartesian coordinate system —usually used in plural Word History First Known Use circa 1889, in the meaning defined above
随便看	nimmers nimming nimravi Nimravus nimravuses nimravusses nimrod Nimrod nimrods nims nimshi Nin nin ninae ninas nincom nincompoop nincompooperies nincompoopery nincompoops nincoms nincum nine nine days' wonder nine days' wonders

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