By studying the choice of the visual angle above,it s discovered that there are three principles to control the choice:relation principle,position principle and aim principle.
通过研究具体言语行为中指称第三者时人称视点的选择情况,我们发现,视点的选择主要受到三条语用原则的支配:亲疏原则、地位原则和目的性原则。
The techniques of site-directed and in-situ dating should meet two requirements.
系统地对比分析了各种微束分析技术在原地原位测年中的优势和局限性,并对近年发展的微区原位化学测年技术(EPMA)和质子激发X射线微探针分析技术(μ-PIXE)进行了探讨。
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