solution line

例句：

1. 1. The engineer drew a solution line on the map to indicate the optimal route.
   工程师在地图上画了一条解决方案线，以指示最佳路线。
2. 2. The company's new product line will be unveiled at the trade show.
   公司的新产品线将在贸易展上公布。
3. 3. The team decided to use a different approach to solve the problem.
   团队决定采用不同的方法来解决这个问题。