紫外线指数是由世卫组织、联合国环境规划署和世界气象组织共同制定的紫外线测量国际标准。
The UV index (UVI) is the international standard for UV measurement, developed by WHO, the United Nations Environment Program and the World Meteorological Organization.
紫外线指数是由世卫组织、联合国环境规划署和世界气象组织共同制定的紫外线测量国际标准。
The UV index (UVI) is the international standard for UV measurement, developed by WHO, the United Nations Environment Program and the World Meteorological Organization.
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