adjusting nut

例句：

1. 1. The engineer had to adjust the nut on the bolt to ensure it was properly secured.
   工程师必须调整螺栓上的螺母，以确保它被正确固定。
2. 2. The car's engine needed some adjustments to get it running smoothly.
   汽车的引擎需要一些调整才能顺畅运行。
3. 3. He adjusted the nut on the door hinge to make sure it would not come loose.
   他调整了门铰链上的螺母，确保它不会松动。