bee line

例句：

1. 1. The bee lines are the main routes for honeybees to travel between hives.
   蜜蜂线是蜜蜂在蜂巢之间旅行的主要路线。
2. 2. The bee lines were used to guide the workers back to their hive after collecting nectar.
   蜜蜂线被用来引导工人们收集完花蜜后返回蜂巢。
3. 3. The bee lines were carefully marked on the map to help us find our way around the apiary.
   我们在地图上仔细标出了蜜蜂线，以帮助我们在养蜂场周围找到方向。