Punch down any loose nails so that the floor is quite smooth.

把所有松动的钉子都钉进去，使地板平滑。

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If using this method, be sure to punch the holes from the opposite side and snip off the punched pieces of lead to avoid having them come loose inside the frame.

如果使用这个方法，一定要确定钻孔时要从外拍框向内拍框打孔，谨防避震条钻下的部分进入拍体。

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"Keep the ball up against your body that way there isn't any air for anybody to try to punch it loose, " Green-Ellis said in an interview.

WSJ: New England Running Back BenJarvus Green-Ellis Has Zero Fumbles in the NFL