Then when the artisan, the inventor, or we can call him now a scientist, when he just touched something at the chin of the robot, the robot began to sing!

• 然后，这个工匠，这个发明家，我们也可以说他是科学家，摸一下机器人的下巴时，机器人就开始唱歌，歌声优美、清晰。