The eye tracker gives expert and learning performers a glimpse into what they do without thinking about it.
2019年6月六级真题(第一套)听力 Section C
柯林斯高阶英汉双解学习词典释义
N-COUNT
追踪者;追捕者;会循迹追踪的动物
A tracker is a person or animal that finds other people or animals by following the marks left by their feet and other signs that show where they have been.