During the middle of the 20th century, about half of visually impaired school-age students in America read Braille.

在20世纪中叶，美国约有一半的视障学龄学生读盲文。

youdao

During the middle of the 20th century, about half of visually impaired school-age students in America read Braille.

在20世纪中叶，美国约有一半的视障学龄学生读盲文。

youdao