e.g. The ship contained a large number of heavy stones as a ballast.
e.g. He suggested that the novel needed ballast to make it more serious.
e.g. The ballast under the train's tracks is beginning to crumble.
e.g. She added a ballast to the circuitry of the lamp to stop it from flickering.
e.g. The sailors used sand to ballast the ship before it left the dock.
e.g. Next, the workman will ballast the road.
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