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牛顿的不朽著作《自然哲学的数学原理》出版于()年
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Whether pronunciation needs special attetntion or focus in language teaching depends on many factors, especially learner factors.
Stress and intonation are as important as the sounds themselves and should be taught from the very beginning.
Intonation cannot affect the intention of the speaker's message.
在公共场合中， 不可以忘乎所以、为所欲为，不可以高谈阔论、( )。
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