VOICE OVER: This robot helper has been designed by chemists at the University of Liverpool to help them in their research into developing photocatalysts, which are materials that help produce hydrogen from water using light.

画外音：这个机器人助手是由利物浦大学的化学家设计的，旨在帮助他们研究开发光催化剂，这些材料可以利用光从水中产生氢气。