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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.2. Therefore, please check the joystick properties from the Windows Control Panel (or you can enter the JoyToKey menu, "Configuration"-> "Calibrate joystick properties").项羽回头看了一眼，唤过麾下的一些忠心将领。所以倚仗地利优势，用些计谋是必须的。美丽动人的某大学研究生姜喜宝在回国度暑假的飞机上，认识了可爱热情的同龄人勖聪慧，两人一见如故，喜宝的故事由此开始了，她的一生也因为这架航班上与勖聪慧的相识，发生了天翻地覆的改变。Author: Yi Sheng, First Starter: Advertising Informant1. Breeding crayfish, First of all, we must find a good venue. Ponds or paddy fields can be transformed. Attention should be paid to the fact that it is best not to have farmland water flowing into the ponds around, because pesticides must be applied to grow rice now, and if pesticides flow into your ponds, your shrimps will die a lot. If they die, they will generally sink to the bottom of the water, and you cannot find them. Therefore, attention should be paid to the selection and pulling. Water sources should be guaranteed and water should be exchanged for drainage and irrigation.