所屬欄目:礦物學專業(yè)術語
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 ) [閱讀本文] >>