&=x_1 x_2^2 - x_2 x_1^2 - x_0 x_2^2+x_0 x_1^2+x_0^2 x_2 - x_0^2 x_1\\
In Trump’s America, proximity is never neutral.
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该系列热销扭转了苹果此前三年在华销售疲软态势，2025年10月苹果在华手机销量同比增长37%，市场份额回升至25%，巩固高端市场领先地位。（快科技）
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"It's an opportunity to … actually have the suits in microgravity, even if we don't go outside the vehicle in them. You get a lot of good learning from that," Isaacman said.