全国每天耗水量为4100亿加仑。

We use about 410 billion gallons per day for the nation as a whole.

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我们必须把自己的用水控制在每天一加仑以下。

We must limit ourselves to one gallon of water per day.

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一头母牛每天产几加仑的牛奶。

A cow will yield several gallons of milk each day.

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每个人每天至少要储备2加仑水。

At least 2 gallons per person per day should be stored.

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每个人每天至少要储备2加仑水。

At least 2 gallons per person per day should be stored.

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