The utility company sent customers an email explaining new rules to protect the local watershed.

公用事業公司寄電子郵件給客戶，說明保護當地集水區的新規定。

Our shipping route crosses the watershed, so trucks may face delays after heavy rain.

我們的運輸路線會穿過該流域，所以大雨後卡車可能會延誤。

At the meeting, investors asked how the factory project would affect the nearby watershed.

會議上，投資人詢問工廠計畫會對附近的流域造成什麼影響。