There are few things sadder than the end of a close friendship. Whether it happens in a sudden moment of betrayal or after years of gradual separation, the feelings of loss can stay with you for a lifetime.
Lily JamaliNorth America Technology correspondent, New York
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Many say they are still struggling with the memory of that day.
当前，非金属3D打印已凭借多样化的技术和日益成熟的产业链，在消费电子、时尚美学、汽车内饰等领域遍地开花。然而，在更需要承载高强度、高可靠性需求的工业端，金属3D打印仍需进一步推广。
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