improvement
definitions
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noun
The action or process of making or becoming better; a change for the better.ru: улучшение
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noun
A thing that makes something better; an upgrade or enhancement.ru: улучшение
examples
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There has been a marked improvement in his health.
Его здоровье улучшилось.
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The new software is a major improvement over the old one.
Новое программное обеспечение — значительное улучшение.