Practice using the pen as a tracker and pacer.

练习用笔作追踪器和定速器。

As I wrote above, your role model ACTS as a pacer.

如我上面所写，你的行为榜样人扮演着领步人的角色。

The pacer width measurement is combined with the PPM measurement.

该起搏器脉宽测量相结合的PPM公司测量。

One day he noticed a crumpled Piper Tri-Pacer at the end of Mr. Cook's grass airstrip.

一天他注意到库克草地跑道的尽头有一架扭曲的Piper Tri-Pacer飞机。

Use ea pacer like a or your finger--as a focal point to draw your eye across the line or down the page.

使用“节奏器”，例如一支笔或手指，以在阅读一行或一页时，形成一种注视焦点。