您要查找的是不是：
- 窄频UVBNarrowbard ultraviolet B
- 窄频中波紫外线（UVB）midwave ultraviolet
- 窄频narrow band
- 窄频中波紫外线UVB
- 窄频偏调频发射机narrow-deviation FM transmitter
- 窄narrow
- 频数frequence
- UVB辐射UVB irradiation
- 主频dominant frequency
- 窄带narrowband
- UVB光疗UVB phototherapy
- 倍频frequency doubling
- 窄的two-by-four
- UVB照射培养UVB radiation culture
- 载频carrier frequency
- 中波紫外线（UVB）UVB
- 分频frequency demultiplication
- 变窄narrow
- 宽谱防晒，帮助皮肤抵御UVA和UVB。This broad-spectrum sunblock defends skin against UVA and UVB rays.
- 分频器frequency demultiplier
