symmetric
/sɪˈmetrɪk; sɪ`mɛtrɪk/, symmetrical/-rIkl; rIkl/ adjs
(of a design, etc) having two halves whichare the same in size and shape （指图案等）对称的
The plan of the ground floor is completely symmetrical. 一楼的平面图是完全对称的.
the symmetrical arrangement of the gardens, ie one that shows symmetry 花园中对称的布局. Cf 参看 asymmetric.