reading pacers

例句：

1. 1.The teacher used a reading pacer to help the students improve their reading speed.
   老师使用了一个阅读速度计来帮助学生们提高他们的阅读速度。
2. 2. The student was given a reading pacer to measure his reading speed during the test.
   学生被给予了一个阅读速度计，用来测量他在考试期间的阅读速度。
3. 3. The book's author used a reading pacer to track the reader's progress and adjust the text accordingly.
   这本书的作者使用了阅读速度计来追踪读者的进度，并相应地调整文本内容。