Make them from squared paper and sticky tape.
用方形纸和胶带把它们制出来。
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。
Dai said even a commercial version of this software can be considered, with self-defined picture size, squared paper and different kinds of draft paper, and higher precision.
戴昆表示，这个软件甚至可以开发一个商业版本：可自由设定的画幅，加入方格衬底并提供不同种类的草图纸，提供更高的精度等。
Dai said even a commercial version of this software can be considered, with self-defined picture size, squared paper and different kinds of draft paper, and higher precision.
戴昆表示，这个软件甚至可以开发一个商业版本：可自由设定的画幅，加入方格衬底并提供不同种类的草图纸，提供更高的精度等。
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