李明珠的文章也显示了另一个由谷物价格引发的理论问题，即如何定义和界定市场。
Another theoretical problem raised by the grain price data, also illustrated in Li's article, is that of how to define and identify markets.
界定你的问题。随便一张纸，用你的手写手机，电脑也可以，只要能记下你的笔记就可以，详细而周密地定义你的问题，一旦你这么做了，你将发现很快会有解决方案。
Define your problem. Grab a sheet of paper, electronic notebook, computer or whatever you use to make notes, and define your problem in detail.
换言之，阳光的减弱依然是一个有待界定的问题，随着它的范围定义变得越来越清晰，我们对这个世界面临的挑战的性质也就会更明白了。
Solar dimming, in other words, is a problem still in the process of being defined, and as its dimensions become clearer, so will the nature of the challenge the world faces.
在商号权的一般理论问题上，尚存在许多争议，包括对商号的定义也有不同的界定。
In the trade name general theory question, still had many disputes, including the definition of trade name fail to have consensus.
第二部分阐述了关于边境旅游的基本问题，包括边境旅游的定义、性质内涵特点及我国边境旅游的开展意义等，并对边境旅游的范围进行了界定。
Chapter 2 sets forth the basic concepts about border tourism, including its definition, characteristics and so on, and confirms the research range of the thesis.
第二部分阐述了关于边境旅游的基本问题，包括边境旅游的定义、性质内涵特点及我国边境旅游的开展意义等，并对边境旅游的范围进行了界定。
Chapter 2 sets forth the basic concepts about border tourism, including its definition, characteristics and so on, and confirms the research range of the thesis.
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