lock screw

例句：

1. 1. I need to lock the door before I leave.
   我需要离开前把门锁上。
2. 2. The car was locked when we arrived at the parking lot.
   我们到达停车场时，汽车被锁上了。
3. 3.The screws on the hinge were too tight, so I had to unscrew them to open the door.
   铰链上的螺丝太紧了，所以我得把它们拧松才能打开门。