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 ...
SD indicates a S10 operation, the product of D and the inversion operation (i). This is the definition in the textbook. In this video, SD can operate the triangle on the face W to the face A, while the other cubies are unchanged. However, the counterclockwise permutation of the triangle ...