它们的工作原理要么是含有能吸收紫外线的化学物质，要么是使紫外线折射或色散，避开你的身体。
They work by either chemically absorbing UV rays or deflecting and bouncing them off your body.
吸收光谱：记录物质对不同波长的光，通常是紫外光、可见光或红外光吸收情况的图。
Absorption spectrum a plot of the absorbance by a substance of radiation at different wavelengths, usually of ultraviolet, visible, of infrared radiation.
当来自太阳的紫外线轰击到莴笋时，莴笋叶子就会在外层细胞创造吸收紫外线的多酚类物质。
When bombarded with ultraviolet rays from the sun, the lettuce leaf creates UV-absorbing polyphenolic compounds in its outer layer of cells.
本文初步探讨了ARA-2对紫外辐射线的吸收情况，并用活体兔子与人发作载体进行验证，认为它是一种良好的抗辐射物质。
This paper inquires into the UV absorbancy of ARA-2, a natural UV absorber. Verifying by living rabbit and human hair as carrier, ARA-2 is believed to be a good uvioresistant substance.
但它只适用于能够吸收紫外和可见光的物质。
But it can apply only to ultraviolet and visible light absorption substances.
另一种是利用有机物质，吸收紫外光并进行能量转换，以热能形式或无害低能辐射将能量释放或消耗。
The other is utilizing organic matter to absorb the ultraviolet and transfer the energy , then release or consume the energy in the form of heat or by harmless low-energy radiation.
立方硅氧烷及其衍生物在紫外一可见的吸收表现为：随着物质共轭度的增大，吸收强度增大。
The absorbance intensities of UV-Vis spectra of two molecules increase with the increasing conjugated degree of the molecules.
月球紫外-可见-近红外反射光谱（强度，反照率以及吸收特征）是研究月球表面物质组成的重要手段。
The UV-VIS-NIR reflectance spectra of the Moon are an important tool to interpret Moon surface composition.
月球紫外-可见-近红外反射光谱（强度，反照率以及吸收特征）是研究月球表面物质组成的重要手段。
The UV-VIS-NIR reflectance spectra of the Moon are an important tool to interpret Moon surface composition.
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