“ultraviolet protection factor”的概念、定义、翻译、参考文献-科学参考

单词	ultraviolet protection factor
释义	ultraviolet protection factor Encyclopedia 工学抗紫外整理释 ultraviolet protection factor紫外线防护指数皮肤无防护时紫外辐射平均效应与有织物防护时紫外辐射平均效应的比值。又称紫外线防护系数，简称UPF。是衡量纺织品防止紫外线对人体辐射性能的指标。
随便看	closed submanifold closed subscheme closed subset closed subspace closed substructure closed subsystem closed subvariety closed surface closed surface integral closed syllable closed system closed system of elements closed system of functions closed system of hot water supply closed term closed timelike curve closed [time] path Green's function closed time path Green's function closed topological manifold closed topology closed trail closed trajectory closed transformation closed traverse closed type

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