bottleneckn.瓶颈v.阻塞；妨碍adj.狭窄的bottleneck streets隘路bottleneck isotope"瓶颈",同位素Bottleneck question瓶颈问题bottleneck capacity瓶颈容量bottleneck function瓶颈作用bottleneck industry薄弱环节产业bottleneck analysis隘路分析,瓶颈分析bottleneck elements瓶颈因素Bottleneck Shifting瓶颈移动法bottleneck problems瓶颈问题