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 G, while the other cubies are unchanged. However, the counterclockwise permutation of the triangle ...
长期的阿尔茨海默病之谜解开:新的研究揭示了大脑衰老的两条途径 诸平 A new study has revealed distinct cellular paths in brain aging, with one leading to Alzheimer’s disease and the other to a healthier form of aging. This discovery, based on the analysis of 1.65 million brain cells, prov ...