horizontal retrace ratio

例句：

1. 1. In the study of traffic flow, the horizontal retrace ratio is a crucial indicator.
   在交通流量研究中，水平回溯比率是一个关键指标。
2. 2. The engineer used the horizontal retrace ratio to optimize the design.
   工程师利用水平回溯比率优化了设计。
3. 3. The horizontal retrace ratio was used to measure the effectiveness of the traffic control measures.
   水平回溯比率被用来测量交通控制措施的有效性。