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.
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