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What are the differences between slogan sign symbols?

Slogan is a slogan, slogan, generally used in advertising and other publicity aspects

symbol symbol; symbol

Blue is a symbol of peace.

Blue is a symbol of peace.

The cross is the symbol of Christianity.

The cross is the symbol of Christianity.

sign is used interchangeably with "symbol" when it means "mark, symbol".

Mathematical signs Mathematical signs

Sign means "notices and signs", focusing on signs and illustrations expressed in pictures and words.

traffic signs, such as speed limits, road curves, etc.

sign can also be "signs, omens"

Dark clouds are usually a sign of rain Dark clouds are often a sign of heavy rain.

David loves his car very much. He will take his car to a garage at the first sign of problem.

David loves his car very much. He will take his car to a garage at the first sign of problem. Go get it repaired.