[] anything that slows down development or progress, particularly in business or industry（尤指工商业发展中的）瓶颈，障碍◆eliminating bottlenecks in the manufacturing process消除生产过程中的瓶颈⨁major / potential / severe bottlenecks主要的／潜在的／严重的瓶颈⨁to cause / create a bottleneck引致／造成瓶颈⨁to clear / eliminate / remove a bottleneck清除／消除／除去瓶颈