Sulfur dioxide is a toxic gas.

二氧化硫是有毒气体。

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Sulfur dioxide is one of the main causes of acid rain.

二硫化物是形成酸雨的主要原因之一。

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Father: It's because there's too much sulfur dioxide in the air.

父亲：这是因为空气中含有大量的二氧化硫。

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Father: It's because there's too much sulfur dioxide in the air.

父亲：这是因为空气中含有大量的二氧化硫。

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