Natural wonders

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Across
  1. 2. a long way above the ground
  2. 3. 在下面
  3. 4. 极好的
  4. 6. not made by humans
  5. 8. to be bright
  6. 9. having a big distance from the top
Down
  1. 1. not speaking
  2. 5. 符号；招牌
  3. 7. covering a great length or distance
  4. 8. 银色的