【上位】 reflect deeply on a subject; "I mulled over the events of the afternoon"; "philosophers have speculated on the question of God for thousands of years"; "The scientist must stop to observe and start to excogitate" 主題に関して深く考える。
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【上位】 act on verbally or in some form of artistic expression; "This book deals with incest"; "The course covered all of Western Civilization"; "The new book treats the history of China" 口頭で、あるいは何か芸術的な表現で行う。
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