golden key

例句：

1. 1. The golden key to success lies in hard work and dedication.
   成功的金钥匙在于努力和奉献。
2. 2. The old man found the golden key hidden under the bed.
   老人在床下找到了那把金钥匙。
3. 3. The treasure was guarded by a golden key that only he knew how to open.
   宝藏被一把只有他才知道如何打开的金钥匙守护着。