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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.For this reason, we can encapsulate a global publish-subscribe mode object. The following code:鹿安娜在婚礼前接到了一个改变她人生的电话。她的韩国籍男友林志勋电话中告诉她，自己遭遇船难，只能说一声“永别”……鹿安娜打开电视，看到紧急插播的新闻——一艘渡轮倾覆，多人遇难。她不相信挚爱就这么离开了自己，在好友赵平凡的陪伴下前往韩国寻找未婚夫。故事当中经常提到的玉响，玉响即为照片中拍摄到空中飞舞的光斑，带有充满幻想与梦幻般的效果。讲述一个鳏夫父亲Al和他的青少年儿子Fin都爱上了Evelyn——前脱衣舞女王，现在从事花艺职业。当他们发现要竞争同一个女人后，旧疮疤也再次被揭开。If you make a turn along the famous subway line, you will basically reach it.