1. Cover it with a piece of cloth and don't try to screw it because it can get worse. 
   用布把水万头盖着，不要再扭动它，以防情况更差。
2. Cover in a grave 
   用土封好墓穴
3. opencut and cover method 
   明挖法
4. percentage of forest cover 
   森林覆盖率
5. He read the book from cover to cover. 
   他从头至尾读了这本书。

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