translation.en: One Roman strategy that was very interesting was that -- and it really gave them a comparative advantage -- they made sure their soldiers didn't drink even remotely muddied waters.
translation.zh: 罗马人有个对付痢疾的办法很有意思 这让他们取得了比较优势 他们连轻微浑浊的水 都不让士兵们饮用