Because it's less dense than liquid water.
因为它没有液态水的密度大。
Hence ice is less dense than water, so it floats.
因此，冰的密度小于水的密度，所以冰能浮在水上。
The gas is much less dense than either the solid or the liquid .
气体的密度比固体和液体要小得多。
The upward force that a fluid exerts on an object less dense than itself.
施加给比自己密度小的物体的向上作用的力。
The upward force that a fluid exerts on an object less dense than itself.
施加给比自己密度小的物体的向上作用的力。
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