Q1：论文结果意义的阐释部分应该从哪里开始？是否依据原有的故事线？
(1) it can start from the gap, which is the key point of this report, the most important findings and the significance of this study
(2) by zoom out, combinating the general writing technics of the articals which stated some great discoveries, start from the top of the logic tree and sumary backward.
Q2: 论文序言的关键内容有哪些？最关键的部分如何组织？
first, set the overall framework of the paper:
the starting point and the reasons
the key variables and the reasons
the impacting factors of key variables and the reasons
the signifcance of this study and uuniqueness
second, add details: "blood and meat"
Q3:
the practical significance is to help the company to improve their global sourcing.
theoretical significance may be to detail the existing theories to make theories more practical.
