問題解決の鍵を握っている: hold the key to the solution of the question 問題解決の鍵: 1. key to a problem 2. key to the solution of the problem 3. master key〔 【対】 change key〕 殺人事件解決のかぎを捜す: search for clues about the murder 殺人事件解決のかぎを探る: search for clues about the murder 問題解決のヒント: hint to solve a problem 問題解決の手段: conflict-resolution tool 問題解決の手法: problem-solving formula 問題解決の技術: 1. problem-solving skill 2. problem-solving techniques 問題解決の指針: index to the solution of a problem 問題解決の打開策をもたらす: bring a breakthrough in the solution いつでも（人）の問題解決の手助けができるように待機している: be on call to help someone solve the problem 問題解決のための訓練: problem-solving training 問題解決のアプローチ: 1. approach to problem-solving 2. problem-solving approach 問題解決の一つの方法: one way of solving a problem 問題解決の決め手となる: be decisive in resolving the problems
