break-in key

例句：

1. 1. The thief broke into the house and stole the valuable jewelry.
   这个小偷破门而入，偷走了珍贵的珠宝。
2. 2.The police found the break-in key in the suspect's possession.
   警方在嫌疑人身上找到了破门而入的钥匙。
3. 3.The old man kept a spare key hidden under his bed for emergencies.
   老人为了应急保留了一个备用钥匙藏在床下。