名词
中文翻译：谢林恩反射
同义词：
['Snellen chart', 'Snellen test']
例句：
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1. The doctor used the Snellen's reflex to measure her vision.
医生使用谢林恩反射来测量她的视力。
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2. After reading for a while, she went to the Snellen's reflex to check her eyesight.
读了一会儿后，她去谢林恩反射检查视力。
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3. She had to use the Snellen's reflex to read the small print on the menu.
她不得不使用谢林恩反射来阅读菜单上的小字。