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一、素材橙汁是人们比较喜欢喝的一种饮料,特别是在夏天,它消暑解渴,富有营养,深受消费者的喜爱．小刚在超市买了两瓶橙汁,准备中午吃饭时与家人分享,到了中午吃饭的时候,小刚很容易地就把瓶盖拧了下来,他发现瓶盖的周围有一圈齿痕,小刚觉得很奇怪,齿痕有什么用处呢?如果没有齿痕会怎样呢?他从家中找出透明胶带,将齿痕缠绕住．这样一来,瓶盖周围就变得很光滑．小刚再拧,虽然最终拧了下来,但是这一次明显没有原先带有齿痕的瓶盖那么好拧了．
First, the material orange juice is a kind of drink people like to drink, especially in the summer, it relieves heat and thirst, rich nutrition, loved by consumers. Xiao Gang bought two bottles of orange juice in the supermarket and was ready to share with his family when he was eating at noon. By the time of lunch, Xiao Gang easily screwed the bottle cap off. He found a circle around the bottle cap, Xiao Gang. I think it’s weird. What’s the use of tooth marks? What if there were no tooth marks? He took out the scotch tape from his home and wound the tooth marks. As a result, the cap around it becomes very smooth. Xiaogang twisted it again, although it was finally screwed down, but this time it was obviously not as good as the original bottle cap with tooth marks.