[ C ] a device consisting of a weight on a stick or thread that moves from one side to the other, especially one that forms a part of some types of clocks摆,摆锤;(尤指)钟摆
The pendulum in the grandfather clock swung back and forth.落地钟的钟摆来回摆动。
The spaceship's jets were fired periodically to dampen a side-to-side pendulum motion that had developed.宇宙飞船的喷射装置周期性地喷射,以减缓飞船出现的左右摇摆现象。
[ S ] a change, especially from one opinion to an opposite one摇摆不定的事态(或局面);(尤指)观点的摇摆不定
As so often in education, the pendulum has swung back to the other extreme and testing is popular again.人们的观点又回到了另一个极端,考试又流行起来了,这种摇摆不定的现象在教育领域经常出现。