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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.只是徐福虽然厉害，但也无法以一人之力镇住近百万的猛鬼军魂。听到这个消息，苏岸和一些越军将领都激动不已，天可怜见总算是有消息了The default creation event is stored in the current library, and the specified library in which the event was created can also be displayed.2. New certificate (the certificate with the processing date after November 13, 2014, and the project identification number is 553, or 025)GBL Colossus