n.瓶颈；瓶颈路段（常引起交通堵塞）；（尤指工商业发展的）瓶颈；阻碍 变形： 复数：bottlenecks 英英释义： bottleneck[ 'bɔtlnek ]n.a narrowing that reduces the flow through a channel同义词：constrictionchokepointthe narrow part of a bottle near the topv.slow down or impede by creating an obstruction"His l