例句與造句

1. （ because the piece of plastic is smooth , players can slide along the touch screen with zero friction and leave virtually no marks
   小塑料塊很光滑，所以用它在觸摸屏上滑動沒有摩擦，不會留下任何痕跡。
2. It's difficult to find zero friction in a sentence. 用zero friction造句挺難的