pin drift

例句：

1. 1. 钉
   在墙上
2. 1. The pin was too tight and it kept falling off the wall.
   这个钉子太紧了，一直从墙上掉下来。
3. 2. We need to fasten the door securely before we go out.
   在我们出去之前，我们需要把门牢牢地锁上。
4. 3. The car was fixed by a professional mechanic.
   这辆车被一个专业的机械师修好了。