然而治理资金的短缺已成为制约城市湖泊治理的一大瓶颈。
However, the shortage of the controlling money has become the bottle-neck for the controlling of the lake.
作为当今氢燃料电池的一大瓶颈，不仅是燃机的普及，更是其高昂的成本。
One of the biggest issues with hydrogen fuel cells, aside from the lack of fueling infrastructure, is the high cost of the technology.
世卫组织新的政策建议严谨地分析了众多国家在边远和农村地区提供医疗方面的一大瓶颈。
WHO's new policy recommendations rigorously analyse a key bottleneck to medical delivery in the remote and rural areas of many countries.
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