眼动跟踪记录这些移动，并且当眼睛注视时，标记中心凹的位置。
The eye tracker records these movements and the location of the foveal vision when the eyes fixate.
经过在莫西医疗中心为期七周的培训，89名萨满巫医学习了包括微生物理论在内的西医原理，他们参观了手术室，平生第一次看了显微镜：一位上了年纪的女巫医注视着心脏细胞，要求病理学家向她展示一颗“快乐的心”。
They visited operating rooms and peered through microscopes for the first time. Looking at heart cells, one shaman, an elderly woman, asked the pathologist to show her a “happy heart.”
试着全冲程游泳，呼吸每2，但是现在恰好呼吸，中心，在你离开…交替头注视你的时候。
Next, try full stroke swimming, breathing every 2, but now breathe right, center, left... alternating where your head is looking.
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