pendulum

1. N-COUNT The pendulum of a clock is a rod with a weight at the end which swings from side to side in order to make the clock work. 鐘擺

2. N-SING You can use the idea of a pendulum and the way it swings regularly as a way of talking about regular changes in a situation or in people's opinions. (事態(tài)、輿論等的) 搖擺

The political pendulum has swung in favour of the liberals. 政治的鐘擺已經(jīng)擺向了自由派。