annexed leveling line

例句：

1. 1.The engineer drew an annexed leveling line to mark the new road's starting point.
   工程师绘制了一条附加水平线来标记新路的起点。
2. 2. The surveyor used a leveling line to ensure the accuracy of the construction site's elevation.
   测量员使用一条水平线来确保施工场地的高程准确。
3. 3. The construction crew followed the annexed leveling line to construct the bridge.
   施工队按照附加水平线建造桥梁。