视觉灵敏度检测——作为视力检测的组成部分，你需要读出视力表上的字母以测出你的视觉灵敏度，它可以写成分数的形式，比如20/40。
Visual acuity - As part of the testing, you'll be asked to read letters on a distance chart. This test measures visual acuity, which is written as a fraction such as 20/40.
清代官窑瓷器元素成分数据库建立工作，是上海博物馆古陶瓷科技分析研究中的一个重要组成部分。
The construction of element composition database on Qing Dynasty guan porcelain is an important part of scientific research on ancient ceramics in Shanghai Museum.
清代官窑瓷器元素成分数据库建立工作，是上海博物馆古陶瓷科技分析研究中的一个重要组成部分。
The construction of element composition database on Qing Dynasty guan porcelain is an important part of scientific research on ancient ceramics in Shanghai Museum.
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