noun ダウンロード 🔗共有 排水, 汚水 Any water that has been used in some human domestic or industrial activity and, because of that, now contains waste products. Examples : "The factory treats its wastewater before releasing it into the river to protect the environment. " 工場は環境保護のため、排水を川に放出する前に処理します。 environment utility industry science AIとチャット語彙ゲーム読解練習