英汉词典

1. 瓶颈路段；狭窄路段；交通拥堵地段
    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.

2. （阻碍进展的）瓶颈，障碍
    A bottleneck is a situation that stops a process or activity from progressing.

    e.g. He pushed everyone full speed ahead until production hit a bottleneck.
           他催促所有人拼命干活，直到生产遭遇瓶颈。