4:28 天哪，这是假的吗？难道不是 x = 1 和 y = 2 吗？Y 没问题，但 x = -1 似乎不正确####[['NULL', 'Mathematical_Related_Concept', 'NEU'], ['NULL', 'Mathematical_Related_Concept', 'NEU'], ['NULL', 'Mathematical_Related_Concept', 'NEU'], ['NULL', 'Mathematical_Related_Concept', 'NEU']]