Combined with water vapor, sulfur dioxide forms sulfate aerosols, which can spread around the globe, blocking solar radiation and chilling the air before becoming acid rain and snow.

二氧化硫跟水蒸气结合形成硫酸盐气溶胶，这种气溶胶可以遍布全球，在变成酸雨和酸雪之前阻隔太阳辐射，降低气温。

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And when they were buried, we held a memorial service a couple days later in Delaware where thousands of people showed up, and it was a bone-chilling slate day of rain.

WHITEHOUSE: Remembering Senator Robert Byrd