The eye tracker gives expert and learning performers a glimpse into what they do without thinking about it.
2019年6月六級真題（第一套）聽力 Section C
柯林斯高階英漢雙解學(xué)習(xí)詞典釋義
N-COUNT
追蹤者;追捕者;會循跡追蹤的動物
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.