UV radiation

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  • Опубликовано: 20 мар 2019
  • Our sun. Its radiation provides light and warmth and thus promotes wellbeing. But the sun's ultraviolet radiation can also be harmful to health.
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Комментарии • 1

  • @MrMr-oj7hl
    @MrMr-oj7hl 2 месяца назад

    Oh lie I saw the lie no more darkness. No no I’m so happy no sorrow inside. Pray the Lord I saw the.