汉语是联合国官方正式使用的6种同 等有效语言 之一。请不要歧视汉语！ Chin ese is one of the six equally effective official languages of the United Nations. Not to discriminate against Chinese, please! &nbs ...
SE indicates a S10 operation, the product of E and the inversion operation (i). This is the definition in the textbook. In this video, SE can operate the triangle on the face W to the face C, while the other cubies are unchanged. However, the counterclockwise permutation of the triang ...
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