The boy practices the game for many hours a day on the floor with his board.
这个男孩每天在地板上用他的键盘练习很多个小时的游戏。
2
Einstein looked down and found that Newton was standing on a square floorboard with one metre long and one metre wide. He didn't understand.
爱因斯坦低头，看到牛顿站在一块长、宽都是一米的正方形地板砖上，大为不解。
3
This machine is equipped an imported skid proof conveyer belt and the floor friction is enough to prevent short floorboard from skidding out of the conveyer belt.