A bottleneck is a place where a road becomes narrow or where it meets another road so that the traffic slows down or stops, often causing traffic jams.
N-COUNT
（阻礙進(jìn)展的）瓶頸，障礙
A bottleneck is a situation that stops a process or activity from progressing.
例句
He pushed everyone full speed ahead until production hit a bottleneck.他催促所有人拼命干活，直到生產(chǎn)遭遇瓶頸。
英漢詞典釋義
n.
瓶頸路段(常引起交通堵塞)
Roadworks are causing bottlenecks in the city centre.道路施工導(dǎo)致市中心交通阻塞。
英英詞典釋義
Noun
1. a narrowing that reduces the flow through a channel
Verb
1. slow down or impede by creating an obstruction;
"His laziness has bottlenecked our efforts to reform the system"