Y gwahaniaeth rhwng diwygiadau o "Ysgol uwchradd"

Lleihawyd o 45 beit ,  4 o flynyddoedd yn ôl
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[[nl:Voortgezet onderwijs]]
[[ja:高等学校]]
[[pl:Szkoła średnia]]
[[fi:High school]]
[[sv:Gymnasieskola]]
[[th:ไฮสคูล]]
[[zh:高級中學]]
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