大家都搜：
摆锤球
1、cycloid pendulum───圆滚线摆
2、dynamometric pendulum───测力摆
3、pendulum summon───钟摆召唤
4、pendulum bob───（钟）摆锤；[仪]摆锤
5、pendulum board───摆板
6、pendulum clock───[仪]摆钟
7、pendulum swing───测锤摆幅；[体]回摆
8、pendulum cards───钟摆卡片
9、pendulum───n.钟摆；摇锤；摇摆不定的事态
1、the restoring force of a simple pendulum during oscillation is the resultant force of the gravity of the ball and the pulling force of the thread is wrong .───单摆在振动中所受的回复力就是摆球所受重力与绳子拉力的合力，显然，这是错误的。
2、In another lecture on pendulums, he stands back against the wall, holding a steel ball at the end of a pendulum just beneath his chin.───在另外一节钟摆课上，他背靠墙站着，抓着钟摆末端的铁球，紧贴着他的下巴。
3、point: that a period of a pendulum is independent of the mass - the steel ball, plus one professor - hanging from it.───目的是证明：钟摆周期和质量无关—那个铁球的，以及挂在上面的那个物理教授的。