At a factory in southeastern China, robot arms spin balletically, winding long strips of metal into rolls and shaping them into bricks that are destined to become batteries. 在中国东南部的一家工厂里，机械臂如芭蕾舞者般旋转，将长条金属卷成卷，再塑造成块状，它们最终将制成电池。 As workers in white coveralls…