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Generation gap refers to the distance and contradiction（矛盾） between the old and the youth. It's a common（常见的） phenomenon（现象） that exits everywhere in the world and influences both the old and the youth.
Generally speaking， generation gap results in different understanding and appreciation of the great and constant（固定的） changes of the world， different reaction to new things， and different attitudes to tradition（传统） principles（原则） and beliefs. Therefore， we may say where there are the old and the youth； there is the generation gap.
Generation gap is natural， but very influential（有影响的）。 If we cannot deal with it appropriately（适当地）， the gap will be greater and the greater and consequently（结果） affect the work and the relation between the old and the young.

Any is the generation gap "" creates the generation gap the reason "~

What is generation gap?
What are the causes of generation gap?

What is generation gap and what cause it?