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1·The academic field which has developed to study placenames is called toponymy.

而地名学就是以语言为基本线索，研究地名的科学。

2·This article discussed the historical relations between toponymy and ancient nationality in HeiLongJiang Province.

本文论述了黑龙江省地名学与古代民族的历史关系。

3·Toponymy is a newly developed branch of science which systematically studies the etymology and meaning of geographical names.

地名学是对地名的词源、意义等进行系统分析的一门新兴科学。

4·It is pointed out that the adoption of the place names of the nanhai islands habitually used by local fishermen is of significance to toponymy and defending state sovereignty.

论证了现行南海诸岛地名中，大量采用渔民习用地名，在地名学上和维护领土主权上的意义。