The main results are: (1) the declination of intonation in Chinese is realized by the bottom line which is composed of low points of the pitch.
研究主要得到以下结果：(1)汉语语句音高的下倾和重置是由音域下限的移动实现的。
The article is a discussion for calculation method of base-line values of declination in Lhasa Geomagnetic Observatory and has some results.
通过对拉萨地磁台磁偏角基线值计算方法进行讨论，得到了有益的结果。
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