By the time they graduate from Middle School, students are proficient users of two phonetic systems and of both traditional and simplified Chinese characters.
当学生们从双文初中毕业时，都能精通注音与拼音两种系统和正体及简体两种中文字体。
By the time they graduate from Middle School, students are proficient users of two phonetic systems and of both traditional and simplified Chinese characters.
当学生们从双文初中毕业时，都能精通注音与拼音两种系统和正体及简体两种中文字体。
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