bottleneck

1. N-COUNT 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. 道路上的狹窄処

2. N-COUNT A bottleneck is a situation that stops a process or activity from progressing. 瓶頸

He pushed everyone full speed ahead until production hit a bottleneck. 他敦促每個人全速前進，直到生産遇到瓶頸。