初中二年级与高中一年级之间，在易材料的后退式注视点持续时间上差异显著。
Between Grade 2 in junior high school and Gradel in senior high school, the difference in back fixation duration of easy material is significant.
初中二年级与高中一年级之间，在易材料的后退式注视点持续时间上差异显著。
Between Grade 2 in junior high school and Gradel in senior high school, the difference in back fixation duration of easy material is significant.
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