许多欧洲国家和日本的生育率已经下降到人口置换率以下，这让人们担心，劳动力短缺和生产力下降将威胁生活质量。
Fertility rates in many European nations and Japan have dropped below the replacement rate, causing concern that shortages of labor and productivity could threaten the quality of life.
许多国家没有可靠的检验系统，原因是工作人员短缺、基本实验室服务缺失、检验工具包质量低劣，或者其供应不够稳定。
Many countries do not have reliable testing systems because of staff shortages, lack of basic laboratory services, poor quality test kits or their irregular supply.
其实这也无妨，他提到，洋葱的批发供应量还是很短缺的，而且质量也不好。
That is just as well: wholesale supplies are tight, he says, and the quality is poor.
对于经常发生质量下降或数量短缺的供货商也应向采购部经理及时反映。
If any supplier provides goods with declined quality or short quantity, report to Purchasing Manager in time.
中国城镇居民已告别住房严重短缺时代，进入到了增加住房面积与改善居住质量并重的新阶段。
Urban residents have bade farewell to serious house shortage and ushered in a new period featuring increased living space and improved house quality.
人口的增长带来了粮食短缺、空气质量降低、天气状况变化等问题。
Human population growth is creating food shortages, problems of air quality, and changes in weather patterns.
欠发达地区经济落后，关键的制约因素是“有效制度短缺”形成的“软投入”质量低下。
The restrictive factors to economic growth were the inferior quality of soft-input in developing regions, which had been caused by the absence of effective institution.
然而，教师质量低下和数量短缺的问题却一直是美国教育中的一个瓶颈。
However, the problem of low quality and inadequate quantity of rural teachers has always been a "bottleneck" in American education.
然而，教师质量低下和数量短缺的问题却一直是美国教育中的一个瓶颈。
However, the problem of low quality and inadequate quantity of rural teachers has always been a "bottleneck" in American education.
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