To analyze the relationship between CR film quality and different exposal doses.分析不同的曝光条件对于cr影像质量的影响....

exposal的音标：exposal的英式发音音标为：[ɪks'pəʊzəl]exposal的美式发音音标为：[ɪk'spoʊzəl]...

n.曝光，显露...