slot screwing

例句：

1. 1. The car was fixed by the mechanic, who slotted in the screws and tightened them.
   汽车被修车工修好了，他拧紧了螺丝。
2. 2. The bolts were slotted into the holes before being screwed down.
   螺栓被插入孔中然后被拧紧。
3. 3. The engineer had to slot the screws into the holes before starting the project.
   工程师必须先将螺丝插入孔中才能开始这个项目。