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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.新移民犯罪日增，港警商借大陆三名公安偷渡入港，企图将犯罪集团一网打尽。李向东、戚京生和郭学军暗中受程总警司节制，线人大大和三人合作久了，便产生感情。他们屡次破案，惜杀人太多，引起注意，程警司更阳奉阴违。亚父以为如何？范增叹道：当年田荣在背后捣乱，导致彭城被克的教训你们还记得吗？啊？难道现在还要重蹈昔日的覆辙吗？当年彭城的事情历历在目，若非项羽力挽狂澜。Anyway, the smell is very bad. I feel that the worst smell I have ever smelled in my life is it, but it is all a small meaning. It took me a few minutes to feel sick and uncomfortable. The Vietnamese army's attack started again. From this onwards, it can also be said to be the most difficult period in the defense war of the whole 142 position. "Zhao Mingkai said.First of all, let team a and team b play one match first. Who loses the match against team c after the match.就算青莲扯了谎，你也不用用脑子：我娘要是让你送青莲去姑姑家，肯定会等你回来当面说的，哪会让他一个小娃儿出去找你？再说了，那么远的路，咋能不赶车哩？再不然也要骑马才好，咋能让你背着他走路去？黄豆最是生气了。