reasoning powersとは 意味・読み方・使い方

I had had so many reasons to believe in my friend's subtle powers of reasoning and extraordinary energy in action that I felt that he must have some solid grounds for the assured and easy demeanour with which he treated the singular mystery which he had been called upon to fathom.発音を聞く 例文帳に追加

私はさまざま理由から友の不思議な推理力や並外れた行動力を信じていたので、彼が探索を求められている奇妙な謎を自信ありげな、気楽な態度で扱うのには確かな根拠があるにちがいないと思った。 - Arthur Conan Doyle『シャーロック・ホームズの冒険』