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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.悲伤不假，为的却不是项梁而是他自己。"I didn't react at first, and the" buzzing "sound they made at that time was too loud. Did I not say it just now? I could cover the gunshot. A comrade-in-arms around me spoke to me. I could only see his mouth moving, but I couldn't hear any word he said. My ears were full of the" buzzing "sound, which was very noisy." Zhang Xiaobo said.《美妙人生》是因一页清唤来的最“恶”的后果——有了不想要的孩子，契约结婚的二十一岁年轻恋人之间不断冲突的骚动剧，通过孤军奋战的育儿日记，想要展现出所谓真正的爱情是承担因两人的爱情产生的所有结果和责任，并通过这个过程一起成长，又因此感到幸福，这样才是真正的爱情。或者他根本就是说给香荽听的。可黄瓜闪身进了美味斋，于是他就和一个随从截住黄豆，而红椒则被那车夫拦住了。