单词	ruled surface
释义	ruled surface noun : a surface generated by a moving straight line with the result that through every point on the surface a line can be drawn lying wholly in the surface Example Sentences Recent Examples on the Web Questions over pedestrian right-of-way rules surfaced among Seattle Times readers last month after the newspaper covered the installation of a traffic light and crosswalk at Terry Avenue North on Denny Way, an intersection previously not marked. Jessica Lee, The Seattle Times, 18 Sep. 2017 Word History First Known Use 1836, in the meaning defined above
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