食物短缺或过度捕猎都可能威胁到动物的数量。
Either food scarcity or excessive hunting can threaten a population of animals.
联盟将开始一项雄心勃勃的规划——速成培训行动——目的是在经历短缺的国家实现迅速增加合格卫生工作者的数量。
The Alliance will start an ambitious programme - the Fast Track Training Initiative - aimed at achieving a rapid increase in the number of qualified health workers in countries experiencing shortages.
Ofgem发出警告：除非完全改变现有能源供应商的运行模式，否则可以预见英国到2015年，将发生发电厂数量和天然气供应的短缺。
Ofgem warned that the UK could start to see a shortage of power plants and gas supplies by 2015 unless the way energy companies operate is overhauled.
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