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sulfur dioxide

view main entry for sulfur dioxide noun [uncountable] science  /ˌsʌlfər daɪˈɑkˌsaɪd/
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a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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