The materials that allowed the battery-operated facial expressions is a material that we call Frubber, and it actually has three major innovations in the material that allow this to happen.
让这电池驱动 的脸部表情成真的材料， 是我们叫作 Frubber 的材料， 这材料有着三 种主要创新， 让这项科技得 以实现。