Mark 4 is also the first one that we were incorporating touch feedback.

马克4也是我们第一个加入触摸反馈的人。

The robot also gives haptic -- or touch -- feedback, which gives researchers more information about the objects they’re handling -- like how heavy those objects are.

机器人还提供触觉反馈，让研究人员了解他们正在处理的物体的更多信息， 比如这些物体的重量。