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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.漂亮的服装设计师杜丽瑾正当事业辉煌的时候突患绝症，经医生诊断，将不久于人世。面对灾难降临，杜丽瑾首先想到的不是自己，而是深深着恋着自己的丈夫宗林，更放心不下患先天视力障碍的女儿贝贝，她做出了一个深人匪夷所思的决定：在自己剩余的时间里，一定要为女儿找到一个善良的新母亲，为丈夫找到一个体贴的好妻子，尽管这遭到了他人的误解和丈夫的激烈反对，但杜丽瑾执著地不惜采用各种方式达到目的，她以为这是她对丈夫和女儿尽到的最后一份责任。Disney+宣布以8集首季直接预订《超越 Just Beyond》，这部诗选恐怖喜剧改编自BOOM!的畅销视觉文学，原作作者是R.L. Stine（就是《鸡皮疙瘩 Goosebumps》的作者）。改编版会由Seth Grahame-Smith负责。迪士尼公司最近被爆出正计划为1964年的歌舞片《欢乐满人间》（Mary Poppins）筹拍续集，续集的导演是凭借《芝加哥》获得奥斯卡最佳影片奖的罗伯·马歇尔（Rob Marshall）。　　在两人周围又簇拥着一群性格迥异的美丽少女：江湖怪侠丁不三的孙女叮叮当当，雪山派掌门人白自在的孙女阿秀，长乐帮侍女侍剑，皮影艺人欢欢乐乐……她们或温情缠绵柔肠百转，或俏皮创造性我行我素，或精灵古怪行为诡异，或冰雪聪明慧眼识人，或一往情深以心暗许。The life of the brand should gradually develop and grow with the passage of time. The extension of the brand is also developing and changing. This change is not only reflected in the extension of types, but also in the changes in the life cycle of single products themselves.2025年，从毁灭性的恐怖袭击导致的2020年东京奥运会终止开始，联合国控制了之前东京奥运会在东京湾边界的会址地区，并使之脱离了日本的管制。