It has slashed the cost of toll roads to almost one-tenth of the normal level, attracting yet more people on to fume-choked roads.

它将收费公路的成本削减至正常水平的近十分之一，然而致使更多的人走上烟雾弥漫的道路。

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Volunteers were told to think about yawning while they breathed either normal air, pure oxygen, or an air mixture with an above-normal level of carbon dioxide.

当志愿者在正常的空气中、纯氧的环境下，或者混有超过正常的二氧化碳含量的空气中呼吸时，他们被要求要想着打哈欠。

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Volunteers were told to think about yawning, while they breathed either normal air, pure oxygen, or an air mixture with an above-normal level of carbon dioxide.

当志愿者在正常的空气中、纯氧的环境下，或者混有超过正常的二氧化碳含量的空气中呼吸时，他们被要求要想着打哈欠。

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The answer is that the majority of people with autism have severe problems, and will not, and at this stage, with this level of therapy, will not lead a normal life.

答案便是,大多数孤独症患者会遇到很多严重的问题,而在现阶段的心理治疗水平下,是不能够过上正常生活的

耶鲁公开课 - 心理学导论课程节选

Unless the savings rate comes down meaningfully, GDP settles back to a below-normal level.

FORBES: Managing Money

Intensity and duration of these feelings distinguish a normal level of stress from a psychological condition, Kleiman said.

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Perhaps private sector growth would have been even weaker had public sector spending risen at a more normal level.

FORBES: Government Expenditure Growth