reduce the cost [the risk]
コスト[リスク]を減らす
reduce the price to $150
150ドルに値下げする
reduce [increase] the risk of cancer
がんの危険性を減らす[増やす]
reduce the sauce by half
ソースを半量に煮詰める
reduce [ease] traffic congestion
渋滞を緩和する
reduce traffic deaths
交通事故による死亡(者)数を減らす
reduce [increase] unemployment
失業者数を減らす[増やす]
reduce wages to a [the] minimum
賃金を最低限度に減らす
reduce work to simple tasks
仕事を単純な作業にばらす
Reduced tariffs are a stimulus to trade.
関税引き下げは貿易を促進する