Examlex
Pulsating variable stars are more commonly known as pulsars.
Cold Front
A leading edge of a cooler mass of air, replacing at ground level a warmer mass of air, characterized by weather changes.
Rain
Water droplets that fall from clouds in the atmosphere to the ground.
Proposition
A statement expressing an idea that can be true or false.
Controversial
Something that causes disagreement or debate, often because it challenges established views.
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