grinding

• By god, you covered ground .
  老天爷做证，你把这块地面都踏遍了。
• How can we make up ground on our competitors ?
  我们怎样才能赶上竞争对手？
• I was stiff from sleeping on the ground .
  在地上睡了一觉，我感到浑身僵直。
• Electric lights lit up the basket-ball ground .
  电灯把篮球场照得亮堂堂的。
• It prepared the ground in typical fashion .
  它以典型的方式为此准备了条件。
• Nuclear radiations continue to reach the ground .
  核辐射继续不断来到地面。
• The tree fell to the ground with a thud .
  树轰隆一声倒在地上。
• Idleness is a dangerous breeding ground .
  懒散无事是一个富有危险性的温床。
• The costs of ground investigation become excessive .
  地面研究投资得到增加。
• Each scrambled for the football at the football ground .
  足球场上你争我夺。