视和听的中枢使我们能理解书写的和有声的词句。
The centers of vision and hearing enable us to understand written or spoken words.
反复练习能帮助记忆，它可以使人们熟练的演奏钢琴、背诵诗歌乃至阅读和理解这些词句。
Constant practice has such an effect on memory as to lead to skilful performance on the piano, to recitation of a poem, and even to reading and understanding these words.
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