知识贝壳
知识贝壳
所属栏目：矿物学专业术语
Definition: The axis of symmetry or line of symmetry of a two-dimensional figure is a linesuch that,for each perpendicular constructed,if the perpendicular intersects the figure at adistance “d” from the axis along the perpendicular,then there exists anot ......（本文共 626 字 ） [阅读本文] >>