A pacer can help you increase your speed and reduce re-reading. A pacer can also help you to keep track of what you are reading.
节奏器不仅能帮你提高速度，还能避免重复阅读，并协助了解阅读内容。
This will not only serve as a tracker, but it will also serve as a pacer for maintaining consistent speed and decreasing fixation duration.
这样笔就不仅是一个追踪器，而且还是定速器，能帮助维持恒定的速度，同时还能缩短注视时间。
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