1.expound the concept of
2.equality of sovereignty
3.join hands to safeguard world peace and stability
4.memorandom
5.pragmatic adj. 讲求实际的，务实的
6.turbulent adj. 骚乱的，动乱的；风大浪高的，狂风大作的
7.research institutes
8.enterpreneur n.企业家
9.people's democratic dictatorship
10.locomotive n.机车，火车头

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