Wesson advises considering how many people are in the chat.
We're all familiar with the high-pitched squeak of basketball shoes on the court during games, or tires squealing on pavement. Scientists conducted several experiments and discovered that the geometry of the sneakers' tread patterns determines the squeak's frequency, enabling the team to make rubber blocks set to specific frequencies and slide them across glass surfaces to play Star Wars' "Imperial March."
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以下内容来自姚哲口述，经品牌棱镜编辑：
12月23日，中央军委晋升上将军衔仪式在北京八一大楼举行。中央军委主席习近平向晋升上将军衔的陆军政治委员陈辉颁发命令状。新华社记者 李刚 摄