The authors firstly expound the features of the Oscillatory zones in plagioclase and garnet in the several typical district;
作者首先阐述了典型地区斜长石和石榴石矿物中的振荡环带特征；
Firstly, from the point of view of the relationship of authors and works, the high homogeneity is closely related to the constitution of this army writer group.
首先从作品与作家的关系上讲，战争文学高度的同质性与这个军旅作家群体的构成状况密切相关。
Firstly, the authors expound the purpose and significance in establishment of this test site, as well as its guiding thought and principal tasks.
作者首先阐述了建立地震预报实验场的目的意义以及建设滇西实验场的指导思想和主要任务。
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