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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.尹旭低声冷笑一声：混水mō鱼？看来确实如此，到底是什么人？这样居心叵测？陈先生有何看法？陈平摇头道：此人颇为神秘，想要确定身份很难，不过陈平确实有些想法？…,说来听听。1986年《昨夜情深》旧片新拍之作，轻松谐趣地以交叉剪辑的方式呈现了在风流事上男人的说法和女人的想法。Wisawade是一个长袖善舞的出色商人，在他眼里，万物皆可买卖，包括爱情。Wisawade辗转在不同的绝色女之中，为她们一掷千金，但是没有人能令他的视线长久的在自己的身上停驻，他和她们的关系仅止于逢场作戏，寻欢作乐而已。其中一个名为lucy的女子比较特殊，她是名混血儿，她放任wisawade的行为，不做约束，因此她也是wisawade约会的第一对象。Craig Mazin执笔﹑Johan Renck执导的HBO/Sky合拍5集迷你剧《切尔诺贝利 Chernobyl》顾名思义就是那宗闻名的人为灾难事件，背景在1986年的乌克兰，剧中将会描述当时究竟发生了甚么引致这事故，而且当年勇敢的众人是如何牺牲自己拯救处于灾难中的欧洲。In this section, we will learn about the event module. Event module is mainly used to detect some event operations from other modules. It is generally used as the basis for starting programs and is also a relatively simple module. There are also fewer building blocks. We will introduce them one by one through the following diagrams:胡钧顿时俊脸煞白，倒退了两步。