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  • word of the day

    ozone layer

    ozone layer - 365bet中国官方网站 definition and meaning for word ozone layer

    Definition
    (noun) a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
    Synonyms : ozonosphere

  • Word used in video below:
    text: A QUICK WHIFF OF OZONE,
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