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	sinapisms sinapisses sinarchism sinarchist sinarchists Sinarquism sinarquismo sinarquist Sinarquista sinarquists Sinatra sinay bean Sinbad sincamas since since (the) year dot since (the) year one since that time since the year dot since the year one since then since time immemorial since when since year dot since year one

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