ultraviolet A长波紫外线ultravioletadj.紫外线的n.紫外线ultraviolet absorption analyzer紫外吸收分析器ultraviolet ray absorbing glass紫外吸收玻璃ultraviolet absorption spectrum紫外线吸收光谱,紫外吸收光谱ultraviolet light transmittance紫外透过率ultraviolet absorption detector紫外吸收检测器ultraviolet-speetrophotometry紫外分光光度法Ultraviolet fluorometric method紫外荧光法ultraviolet ray resisting paper紫外线防护纸ultraviolet stimulated emission紫外受激发射ultraviolet fluorescence method紫外荧光法

1. When ultraviolet light damages skin tissue, an enzyme called metalloproteinase is produced.
   大量的紫外线损伤真皮层中的胶原纤维并且导致弹力蛋白的畸形生长。