Baroness Thatcher:プレゼンの声は低く https://never-too-late.info/baroness-thatcher%ef%bc%9a%e3%83%97%e3%83%ac%e3%82%bc%e3%83%b3%e3%81%ae%e5%a3%b0%e3%81%af%e4%bd%8e%e3%81%8f/