他反复不断的听，模仿里面的发音。
He listened to them repeatedly and imitated the pronunciation.
反复按声音按钮，进行模仿。
所以同样在幼儿不识英语字母单词的情况下，通过老师所创造的英语听说环境，模仿老师的语音，语调，通过反复练习就能很好的学习第二语言。
Similarly, children can express themselves in English from being in an absolute English-speaking environment stimulated by their teachers without knowing any alphabets by imitating their teacher.
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