Impure drinking water is a cause of disease.
不洁
饮用水是引发疾病

原因。
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女性 Not long before the Crimean War, miasma theory had become so widely accepted that the British government actually approved a plan to drain sewage into drinking water, because that would be less harmful than letting it pong on the surface.
在克里米亚战争前不久,瘴气理论被广泛接受,以至于英国政府批准了一项将污水排入
水
计划,因为这样比让污水在地面上散发更无害。