单词	frustum
释义	frustum /ˈfrʌstəm / noun (plural frusta /ˈfrʌstə/ or frustums) Geometry The portion of a cone or pyramid which remains after its upper part has been cut off by a plane parallel to its base, or which is intercepted between two such planes.An assessment task may ask students to devise a plan for determining the volume of the frustum of a pyramid (a task not previously considered in class).... They only appear as frustums because they are being viewed at from an angle. Depending mainly on the thicknesses of the members, the midplane splits one of the two members into two frusta, thus making a total of three frusta to analyse. Origin Mid 17th century: from Latin, 'piece cut off'.
随便看	adenylate cyclase adenylated adenylate kinase adenylating adenylation adenylic acid adenylyl adenylylated adenylylating adenylylation adenylyl cyclase Adephaga adephagan adept adeptical adeptist adeptly adeptness adeptship adeptus adequacy adequal adequate adequately adequateness

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。