Embedding metallic wires in the hydrogel might replace conducting surfaces as the electrode, says Yuan.

Yuan 说， 在水凝胶中嵌入金属线可能会取代导电表面作为电极。

Right now, robots shoed with it can only climb metal or some other electrically conducting surface (because such surfaces need to act as electrodes).

目前，装有它的机器人只能爬上金属或其他一些导电表面（因为这些表面需要充当电极）。