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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.The steed stepped on the snow to bid farewell to the old year, and the golden sheep presented a gift to Yingchun!一共有两部共14单元，分别是：Shanghai Girls Escape Jiangxi Rural Areas事业成功广受欢迎的喜剧演员乔治•西蒙斯（亚当•桑德勒 Adam Sandler 饰）发现自己身患白血病，决定趁有生之年重返单口笑话表演舞台。在一次表演中乔治结识了单口笑话表演爱好者艾拉（塞斯•罗根 Seth Rogen 饰）。穷困潦倒的艾拉一直梦想成为一名职业单口笑话演员，付不起房租的他一直借住朋友电视演员马克（詹森•舒瓦兹曼 Jason Schwartzman 饰）的客厅，同住的还有单口笑话表演爱好者利奥（乔纳•希尔 Jonah Hill 饰）。艾拉被乔治雇佣成为私人助理，说服乔治将患病消息通家人与前未婚妻劳拉（莱斯利•曼恩 Leslie Mann 饰）。乔治的白血病在新型实验药物的作用下得到控制，惊喜的他与艾拉前往旧金山表演，在城北马林县家劳拉家中二人旧情复燃。但劳拉的丈夫克拉克（埃里克•巴纳 Eric Bana 饰）此时突然返家，一切变得尴尬又糟糕……但是，机会来了，没有人会放过，何况是这么好的机会。