diad二重: two-fold; double对称: symmetry; symmetrical的: 4次方是 The fourth power of 2 i ...二重对称: diad symmetry二重对称轴: two fold axis of symmetry; two-fold axis of symmetry下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:二重对称的，即可在微信中查询翻译
