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the same day
当選と入学が同日に重なり驚いた。
I was surprised that my acceptance and enrollment fell on the same day.
同日に行われた二つの試合が引き分けに終わった。
Two matches held on the same day both ended in draws.
大統領選挙と地方議会の投票が同日に実施される予定だ。
The presidential election and local assembly vote are scheduled to be held on the same day.