Jisho

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水泳
Wikipedia definition
1. Masters swimmingMasters swimming is a special class of competitive swimming for swimmers 25 years or older (Canada and the USA allow adults 18 and over and have an 18–24 age group, while Australia allows adults 18 and over and has an 18–24 age group). They compete within age groups of five years, with a swimmer's age group in a certain year determined by his/her age on the last day of that year (age is determined as of the day of the competition in the U.S.
Read “Masters swimming” on English Wikipedia
Read “マスターズ水泳” on Japanese Wikipedia
Read “Masters swimming” on DBpedia

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