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. 道路上的狭窄处

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

He pushed everyone full speed ahead until production hit a bottleneck. 他敦促每个人全速前进，直到生产遇到瓶颈。