以下为句子列表：
英文: During the accelerated thermal aging and ultraviolet radiation aging of PMMA which is used as the core materials of fiber in POF, it was found that the relative permittivity of PMMA decreased significantly to approximately equal to its square refractive i
中文: 摘要实验中观察到用作塑料光纤纤芯材料的纯有机玻璃（聚甲基丙烯酸甲酯）在加速热老化和紫外老化过程中其相对电容率急剧下降至大约等于其折射率的平方，即有机玻璃由极性聚合物变为非极性聚合物（“全去偶极子极化”现象）。
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英文: Materials: stainless steel or plated metal, painted metal finish, white frosted glass cover / diffuser or Arclic cover/diffuser or PMMA cover/diffuser, or marble cover/ Diffuser.
中文: 材料：采用不锈钢或电镀/烤漆金属耐腐蚀性能高，玻璃罩或者压克力罩PMMA或透光云石或仿石材罩。
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英文: PMMA is named the plexiglass, is one kind of development early important thermoplastic, has the good transparency, the chemical stability and the weathering resistance, easy to dye, easy to process, the outward appearance is exquisite, has the widespread
中文: PMMA俗称有机玻璃，是一种开发较早的重要热塑性塑料，具有较好的透明性、化学稳定性和耐候性，易染色，易加工，外观优美，在建筑业中有着广泛的应用。
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英文: Methods Percutaneous PMMA cementoplasty was performed in cases, including the lesions of S in 9 cases, acetabulum in 7 cases, ischium in cases, humerus in cases, and tibia in case. There were local lesions.
中文: 方法患者例,S病变9例,髋臼病变7例,坐骨病变例,肱骨病变例,胫骨病变例,病灶共计个。
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英文: PMMA artificial eye formulate for oculus wear directly.
中文: 眼外伤等眼外形破坏时PMMA义眼的整容效果
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