Bell thought that if he could make speech visible by actually showing the vibrations of the voice, he could teach his deaf pupils to make the same vibrations themselves. 貝爾認為如果能以某種具體的形式顯示聲音的振動(dòng)，使語(yǔ)言變得可以看見(jiàn)，他就可以教耳聾的學(xué)生自己發(fā)出同樣的振動(dòng)來(lái)。
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