The center of the museum is open, so people can look up toward the roof or down toward the ground floor.
VOA: special.2009.04.06
Someone with both feet on the ground may not be as open and easy to deal with as someone who is down to earth.
VOA: special.2009.03.08
It sits flat on the ground with the bottom open to the earth.
VOA: special.2010.07.13
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