在这一阶段里，网络给他们的生活、学习带来很多便利性，同时也影响着他们尚未完全形成的道德观念、价值取向、思维模式等。
In this period, network brings in much convenience in their life and study, and also exerts much influence upon their developing views of morality, values and thinking way.
冷战后，国际安全形势发生了前所未有的转折性变化。
After the Cold War, a transitional change had happened in the international security.
在第二部分第一篇论文中，我们系统研究了二维非交换李代数及其全形的可解性、完备性与非半单性等性质。
In the first paper of the second part , it studies two dimensional noncommutative Lie algebra and its solvability, completeness and nonsemisimplicity and so on .
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