level-peg

例句：

1. 1. The car needs to be leveled before it can start.
   这辆车需要水平后才能启动。
2. 2. The engineer used a level-peg to check the accuracy of the measurements.
   工程师用水平尺检查测量的准确性。
3. 3. The builders were using a level-peg to mark the foundation of the new building.
   建筑工人正在使用水平尺标记新建筑物的基础。