图1. (IMAGE)

Science China Press

图1.

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(a) [2]索烃、[3]索烃、环中环和分子Borromean环结构；(b) 日本佛教真言宗豐山派的宗纹；(c) 基督教的三位一体图案；(d) 中国古代的孔明锁

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