to cover densely

• 阴云密布

  there is a dense cover of dark clouds

• 皱纹密布

  be covered in wrinkles

• 那儿暗探密布。

  There are spies everywhere there.

• 新厂矿密布全国。

  New factories and mines are spread densely throughout the country.

• 铁路网密布全国。

  The railway network covers the entire country.