And of course, if the cost of installing a telephone is going down, because there's a digital revolution going on, And I knew a little economics by then -- it says Adam Smith taught us that specialization leads to productivity.
仮に電話の設置費用が下がれば これは益々素晴しい 私も経済学をかじっていましたが アダム スミス曰く 専門化が生産性を高める