grinding

• Nobody dared lift their eyes from the ground .
  没有人敢把视线离开地面。
• He planted his feet firmly on the ground .
  他在地上双脚站得很稳。
• The ground levels off beyond the woods .
  过了树林，地面就平坦了。
• It wo n't grind down any finer than this .
  不能磨得比这个再细了。
• She scraped a hollow place in the ground .
  她在地上挖了一个窟窿。
• The wounded bird fluttered to the ground .
  那受伤的鸟拍着翅膀落到地上。
• The ground was full of cracks in the summer ..
  夏天地上都是裂痕。
• Their marriage has been on shaky ground .
  他们的婚姻一直不牢固。
• The bluebells had cascaded on to the ground .
  风信子掉到了地上。
• Take us down to the ground floor , please .
  请带我们到楼下下去。