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These pauses typically occur at about three per second, and the eyes then jump to another spot, until several important points in the image are registered like a series of snapshots.
重点词汇： pauses，typically，spot，snapshots
重点短语：a series of
解析：两个句子并列构成本句，“These pauses typically occur at about three per second”和“the eyes then jump to another spot”并列，“until several important points in the image are registered like a series of snapshots”为时间状语从句。
翻译：通常情况下，大约每秒会停顿三次，然后眼睛跳跃到另一处，直到图像中的几个重要点像一系列快照一样已经完成注册。
