• 事件をつまびらかに調べる
    • investigate a case closely [in detail]
    • 争いの理由をつまびらかにする
    • make clear the reasons for [clarify the causes of] a dispute
    • 大統領暗殺者の背後関係はつまびらかでない
    • It is not clear who was behind the president's assassin.