In order to achieve a better understanding of global structure of the system, first, we introduce a new concept that is called double sector region in chapter III.
在第三章中，为了更好的讨论系统的全局拓扑结构，本文首次引入双扇形区域的概念；
2
Chapter III is to analyze the reasons for long-term double surplus in China.
第三章分析了中国长期出现双顺差的原因。
3
The present invention proposes exonuclease III digesting double stranded nucleic acid molecule coated in microporous plate and containing special marker to detect transcription factor protein.