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to; for; from the standpoint of; as far as ... is concerned
私わたくしにとって大切たいせつな思い出おもいでです。
It is a precious memory for me.
子供こどもにとって遊びあそびは重要じゅうようだ。
Play is important for children.
彼かれにとって難しいむずかしい決断けつだんだった。
It was a difficult decision for him.