level adjustment

例句：

1. 1. The engineer made a level adjustment to the machine before starting work.
   工程师在开始工作前对机器进行了水平调整。
2. 2. The car needs a level adjustment to ensure it runs smoothly.
   汽车需要水平调整以确保顺畅运行。
3. 3. The construction site needed a level adjustment to ensure the foundation was stable.
   施工现场需要进行水平调整，以确保地基稳固。