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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.Use the following command to append a rule to the INPUT chain of the filter table, which means to accept all messages from 192.168. 1.146 destined for the local machine.高三毕业在即，顾小满为了能与男神左岸继续做同学，拿出练习散打的精神死磕学习。自身刻苦努力加上天才学霸左岸的独家指导，顾小满达成最强逆袭，成功与男神考入同一所大学，向着爱情和学业一路高歌猛进。如果说高中生活两人之间是暗戳戳的小互动不间断，狠狠撩拨观众的少女心。那么大学生活则是依旧笑料不断，两人敞开发糖，甜度升级翻倍。都说最甜不过双向暗恋，两个初心萌动的人在靠近彼此的路上最是甜蜜有爱、百看不倦，甚至连途中的“意外”事件都显得萌趣十足。　　武汉空袭、重庆空袭，刘长岭和高云天用不屈的斗志迎接日本咄咄逼人的攻势，在空战中高云天失去了一条腿，刘长岭Tank will die if he does nothing for a long time. He will not throw stones or shoot people. The most intuitive safe house shut tank out and died for a while.尹旭等人只好下马步行，如此一来速度慢了不少。Japan: 300