According to the report, in general, the country's environment quality changed slightly in 2001, basically maintaining the level of 2000. However, the overall environmental situation remains grave.

《公报》表明，2001年全国环境质量总体变化不大，基本维持在2000年度水平，但全国环境形势依然不容乐观。

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That level of precision is critical to the snake for maintaining its body temperature.

对于蛇来说，这种精确度对于保持体温至关重要。

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Maintaining a level of daily physical activity may help mental functioning, says Carl Cotman, a neuroscientist at the University of California at Irvine.

加州大学欧文分校的神经学家卡尔·科特曼表示，每天保持一定的体育锻炼可以促进心理机能。

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The respiratory system plays an important role in maintaining our internal environment at the proper level of oxygen, by bringing the right amount in.

呼吸系统的重要性在于,通过向体内输入适量的氧气,维持人体内环境中的氧平衡

耶鲁公开课 - 生物医学工程探索课程节选

Maintaining the funding level provided by the expired government grant would mean a 2.5% council tax rise just for starters.

BBC: Council tax freeze splits Tories

Thus, House Republicans will find it very difficult to offset the cost of those tax cuts while maintaining the current level of progressivity.

FORBES: Paul Ryan's Budget: Fact, Fiction And The Hole The House GOP Has Put Itself In

The system's 3D Surround Processor analyzes content to distribute sound in multiple directions while maintaining the appropriate balance level.

ENGADGET: LG's 2013 AV lineup puts NFC into Blu-ray player, 9.1-channel home theater