Your first robot should be about learning how to build a robot, not how to make a neat robot.
你的第一个机器人，目的应该是学习怎么制作一个机器人，而不是制作一个灵巧的机器人。
2
The robot teachers are used to help improve learning.
机器人教师被用于帮助改善学习。
3
Now, computer scientists from the Machine Perception Laboratory at the University of California, San Diego have used machine learning to enable the robot to learn expressions on its own.