heavy key

例句：

1. 1.The heavy key fits the lock perfectly.
   这把重锁完美地匹配了锁。
2. 2. He used a heavy key to open the door.
   他用一把重锁打开了门。
3. 3. The heavy key was too heavy for her to carry.
   这把重锁太重，她拿不动。