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3. Physical period: Uniform circular motion is a kind of periodic motion. The so-called periodicity refers to the fact that after a certain period of time, the moving object repeats back to its original position, and the instantaneous speed repeats back to its original size and direction. The time it takes for an object to move in a uniform circle is called a period. The period is expressed by the symbol T, and the period is also a physical quantity describing the speed of uniform circular motion. The long period indicates the slow motion of the object, while the short period indicates the fast motion of the object.　女侠风灵得悉六弦魔琴重现江湖，神秘人用以滥杀无辜，妄图独霸武林；唯一能克制魔琴的只有火弦弓及火羽箭，却只有袖手樵隐知道弓与箭之下落；风灵找老顽童、神偷、猿飞等，一起往找樵隐；期间，众人竟发现逍遥隐士就是六指琴魔！在找到樵隐之前，琴魔为争霸已陷疯狂。说句见外的话，那就是李斯现在已经古稀之年，寿命已经不是很长久。为庆祝自己的成功求婚,青年富商张晗与自己的未婚妻李维鑫带着一众好友到自己的私人别墅去度假,一行七人在到达别墅区后,却总觉得除了他们之外这个别墅里还有其他的人,之后一件接着一件的怪事发生了,先是张晗在别墅里奇怪的失踪,后来又有人被特别残忍的方式杀害,张晗的好友叶良(朱文鹏饰)与李维鑫的闺蜜邓小佳也感觉到整件事仿佛就是一个圈套,他们必须靠自己才能逃出生天.　　多年的荣辱与共，佳琳与张墨白的生命紧紧缠绕，同时探究家族没落的真相也越来越清晰，面对真相的揭示，她的心却愈发纠结痛苦。生活的另一面，佳琳悉心照料的妹妹无法体谅她的苦心，自甘沦落；而懦弱的姐姐也被裹挟在两大家族的争斗中，几近反目，亲情也无法弥合。