How to ensure a sustainable improvement of teaching quality has become a key problem that every institution of higher learning has to consider and confront.

如何保证教学质量持续提高，已成为每所高校必须考虑和面对的核心问题之一。

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Fair, just, scientific and rational supervision and evaluation system is conducive to the sustainable improvement of comprehensive quality of medical institutions.

公平、公正、科学、合理的监管评价体制，对促进医疗机构综合质量的持续改进大有益处。

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Products quality is guaranteed only through production processes, and sustainable improvement of processes deviation, cycle time and output are significant to cost reduction and revenue improvement.

产品质量由产品加工的过程来保证，而过程偏差、周期时间和产出的持续改进对于降低产品成本、增加收入具有十分重要的意义。

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We would focus additional equity commitments into Financials, Information Technology, and Industrials as correction progresses and further evidence of sustainable improvement in (1) consumer sentiment, (2) employment and (3) housing emerges.

FORBES: The Pause That Refreshes

Kevin Daly of Goldman Sachs thinks there are modest grounds for optimism: the sectors that shrank most this time, such as oil and gas, are notoriously volatile, whereas those that grew, such as services, may be seeing sustainable improvement.

ECONOMIST: Economic stumbles

Network Rail's chief executive, John Armitt, says that he and his board had always made it clear that it would take 18 months to show a noticeable difference in performance and three to five years to produce sustainable improvement.

ECONOMIST: Railways: Anyone know how to run a railway? | The