1·The polysemy of POP music's definition is easy to cause research target to be undetermined, therefore a determinative definition of popular music is prerequisite.
流行音乐定义的多义性容易导致论述对象的模糊，所以限定流行音乐定义的范围是论文得以展开论述的前提条件。
2·This article deals with the following four linguistic topics: motivation, transparency, polysemy, and semantic copying (or duplication), each forming a section.
本文就语言研究中的四个题目发表了个人见解。它们是：理据性、透明度、多义性、语义复制。每一个题目为一节。