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Cambridge University researchers make robotic hand capable to hold objects 剑桥大学科学家研发出能抓握物体的机械手An incredible number of outdated gadgets 'stockpiled in drawers' 上千万件电子产品 “被堆放在抽屉里”Biodiversity loss dangers 'ecological meltdown' – scientists 生物多样性丧失可能造成 “�