其中高阶谐振的产生，由于可以作为产生真空远紫外线和软X射线的可能途径，受到人们的极大关注。
The most attractive one is high order harmonic generation (HHG), which can be used as a source of extreme ultraviolet (XUV) and soft X-ray lasers.
虽然UVB进入真皮的数量远少于UVA，但因其损伤强度大，且光老化是一个紫外线长期辐射累积的结果，UVB对真皮成纤维细胞造成的损伤也不容忽视。
Photoaging was a result of long-term ultraviolet accumulation and UVB could also produce a marked effect although its quantity was less than UVA into dermis.
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