Fold a piece of squared paper along the diagonal into a triangle, and fold into another triangle.
把一张正方形的纸沿着对角线折成三角形，然后再对折一次。
The distribution of the most-subsided areas, lacustrine terrace and Quanternary fold is characterised by the diagonal symmetry.
第四纪最大沉降中心、湖积台地及第四纪褶皱分布呈对角对称。
The distribution of the most-subsided areas, lacustrine terrace and Quanternary fold is characterised by the diagonal symmetry.
第四纪最大沉降中心、湖积台地及第四纪褶皱分布呈对角对称。
应用推荐