The adhesive of table tennis racket which was solubility was produced by modified PVA using nano-silica.
采用聚乙烯醇（ PVA）为基料，用纳米二氧化硅对其进行改性，制备出了成本低、无毒、 水溶性的乒乓球拍胶粘剂。
Your peripheral vision may not be all that good for watching a fast moving table tennis ball onto a relatively small racket head.
你的余光也未必那么好，能看着一些如此快速运动的小乒乓球到达一个相对较小的拍头上。
Your peripheral vision may not be all that good for watching a fast moving table tennis ball onto a relatively small racket head.
你的余光也未必那么好，能看着一些如此快速运动的小乒乓球到达一个相对较小的拍头上。
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