最优经济增长问题一直是经济控制论中讨论的主要问题，这方面已有不少文献积累。
The optimal economic growth is always a main problem in economic control theory and it was investigated by many scholars in their papers.
研究了直接消耗系数变化对最优经济增长速度的影响，给出了最优经济增长速度变化量的一个下界。
What is being discussed is the influence upon the best increasing speed of national economy when some consumption coefficients change. A low limit of the changes of the speed is given.
而现在，甚至该事业最优秀的支持者们也谈及一个大陆已被债务，人口下降与经济增长偏低所组成的“百慕大三角”包围。
Now even the project’s greatest cheerleaders talk of a continent facing a “Bermuda triangle” of debt, demographic decline and lower growth.
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