spiral lay

例句：

1. 1. The engineer laid out the plans for the new bridge in a spiral pattern.
   工程师以螺旋状图案规划了新桥的蓝图。
2. 2. The team decided to lay down some groundwork before starting the project.
   团队决定在开始项目之前先做一些准备工作。
3. 3. The architect designed a spiral staircase that leads up to the main floor.
   建筑师设计了一个螺旋楼梯，通向主楼层。