They were so thin C it seemed as if they would break against the waves.

VOA: special.2010.03.06

At about nineteen-thousand meters, the air is so thin and the amount of oxygen so small that a person needs a lot of special equipment to survive.

VOA: special.2011.04.06

And then,when my head was well in the room, I undid the lantern just so much that a single thin ray of light fell upon the vulture eye.

VOA: special.2009.05.16