関武夫さんという自然を愛している方が生前持っていた森を、ご遺族の方が（財）埼玉県生態系保護協会に寄付したんですね。 Using This definition, presented a natural quantity n, the sentence "a set S has n features" could be formally defined as "there exists a bijection from n to S. Bea BonmotBea Bonmot 29644 silver badges1515 bronze badges 12 48 I agree with quite a few that "thank God" is https://share.evernote.com/note/c1a29341-55fb-6549-054a-7664564039cf