by-pass ratio

例句：

1. 1. The by-pass ratio of the highway is 20%.
   这条高速公路的旁路比率是20%。
2. 2. The engineer calculated the by-pass ratio to optimize the traffic flow.
   工程师计算了旁路比率以优化交通流。
3. 3. The by-pass ratio was used to reduce congestion on the main road.
   旁路比率被用来减少主要道路上的拥堵。