level(l)ing screw

例句：

1. 1. The car was leveled tothe ground by a large tree.
   一辆汽车被一棵大树压平了。
2. 2. The engineerused a leveling screw to adjust theheight of the roof.
   工程师用一个水平螺丝调整屋顶的高度。
3. 3. The construction crew usedleveling screws to ensure the foundationwas level.
   建筑工人使用水平螺丝确保地基水平。