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.
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