高速公路上的这个收费站经常成为交通堵塞的关键瓶颈。

This toll booth on the highway often becomes a major ___chokepoint for traffic.

这个峡谷是军队必须通过的咽喉要道。

The canyon is a crucial military ___chokepoint that forces must pass through.

生产线上的这台旧机器是整个制造流程的瓶颈。

This old machine on the production line is the ___chokepoint in the whole manufacturing process.