Likewise, a pendulum with a big ball on the end of a very light string -- called simple pendulum -- would behave very differently from a pendulum that uses a heavier stick -- what’s known as a physical pendulum.

同样，在一根很轻的绳子末端有一个大球的钟摆——称为单摆——与使用较重的棍子的钟摆——也就是所谓的物理钟摆——的行为会有很大不同。