Forty percent of the waterways have become undrinkable.

百分之四十的河川水道已变得不可饮用。

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They found the water was poisonous and undrinkable for people or animals.

他们发现，水是有毒的和不能饮用的人或动物。

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They found the water was poisonous and undrinkable for people or animals.

他们发现，水是有毒的和不能饮用的人或动物。

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