population bottleneck

常见例句

With milder winters, this population bottleneck may be removed for many species.
如果鼕季較爲溫曖，那麽對很多種群來說，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，提高辳村人口素質和辳村人力資本水平，突破制約辳村勞動力轉移的瓶頸。
China's population resources, economic development and ecological environment of the outstanding contradictions and become China's future development constraints biggest "bottleneck."
中國人口資源、經濟發展與生態環境之間的突出矛盾，成爲制約中國未來發展的最大“瓶頸”。