基本解釋[數(shù)學(xué)]三重對稱三次對稱英漢例句雙語例句And fivefold, threefold and twofold axes of rotational symmetry.五重，三重和兩重螺鏇對稱軸。threefold symmetry更多例句詞組短語短語threefold axis of symmetry 三重對稱軸threefold symmetry更多詞組專業(yè)釋義數(shù)學(xué)三重對稱三次對稱