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单词 UVA
释义
UVA (yvēā)
n.
Ultraviolet radiation that is found in sunlight, has a wavelength between 320 and 400 nanometers, and can cause damage to the skin after long-term exposure, including premature aging and cancer.

[u(ltra)v(iolet) A (the letter A being used to designate the first of the categories based on wavelength in which ultraviolet radiation is classified).]
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