population bottleneck

基本解释

With milder winters, this population bottleneck may be removed for many species.
如果冬季较为温暧，那么对很多种群来说，抑制作用就可能消失。
Improving the quality of rural population and the level of human capital, breaking the "bottleneck" restrictions of rural labor transfer.
第六，提高农村人口素质和农村人力资本水平，突破制约农村劳动力转移的瓶颈。
China's population resources, economic development and ecological environment of the outstanding contradictions and become China's future development constraints biggest "bottleneck."
中国人口资源、经济发展与生态环境之间的突出矛盾，成为制约中国未来发展的最大“瓶颈”。