At the office of your pediatrician or a pediatric ophthalmologist, take advantage of special vision tests for preschoolers that don't require knowledge of the alphabet.
在儿科门诊或专门的眼科专家诊所，利用一些特殊的方法为学龄前儿童进行视力测试，并且是不需要认知字母表的。
More English knowledge: English alphabet, English phonetic, English idiom, English Toponym, English Irregular Verb etc.
英语字母，英语音标，英语习语，英语地名，英语不规动词等更多英语基础知识。
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