雅思阅读辅导：锚式擒纵机构的优势

　　阅读段落

　　To address this, a variation on the original escapement was invented in 1670, in England. It was called the anchor escapement, which was a lever-based device shaped like a ships anchor. The motion of a pendulum rocks this device so that it catches and then releases each tooth of the escape wheel, in turn allowing it to turn a precise amount. Unlike the original form used in early pendulum clocks, the anchor escapement permitted the pendulum to travel in a very small arc. Moreover, this invention allowed the use of a long pendulum which could beat a second and thus led to the development of a new floor-standing case design, which became known as the grandfather clock.

　　段落大意

　　本段主要介绍了在原来的擒纵机构的基础上发展而来的锚式擒纵机构的优势。

　　阅读笔记

　　1670, in England: anchor escapement

　　Advantages:

　　1. Permitted the pendulum to travel in a very small arc.

　　2. Allowed the use of a long pendulum beating a second

　　逻辑关系

　　1. 比较

　　The original form used in early pendulum clocks

　　The anchor escapement permitted the pendulum to travel in a very small arc.

　　2. 并列

　　The anchor escapement permitted the pendulum to travel in a very small arc.

　　This invention allowed the use of a long pendulum which could beat a second.