It has been found that the variation of blood ammonia level in short time strenuous exercise reflects the status of metabolic balance in anaerobic energy supply system.

研究发现，短时间剧烈运动中血氨水平的变化反映了无氧供能系统的代谢平衡状况。

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Office space in top-level buildings, in most cities, is in short supply.

在大多数城市，高级楼房的办公室场地供不应求。

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That honor goes to finding out, back during my first stay in China in the mid-1980s, when glasses were in short supply, that spectacles were distributed with preference given to those who had attained a high level of education, the notion being that academics and teachers needed to read for a living.

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