小儿子是天生的流浪儿.The youngest is a born rider of the rails.小儿子是个天生的流浪儿.The youngest is a born rider of rails.这个流浪儿以前从没听过这样的话, 这也是他有生以来听到的最快乐的话.These were strange words to the vagabond boy's ears, and the pleasantest he ha...
简介氟树脂的种类和聚四氟乙烯的发现经过.Sorts of fluororesins and the discovery of polytetrafluoroethylene are introduced.液晶容器的内表面上可以包括一含氟树脂.An inside surface of the liquid crystal container may include a fluorine resin.聚全氟乙丙烯是一种重要新型氟树脂产品,本...