diamondback

例句：

1. 1. She wore a diamondback necklace for the party.
   她在聚会上佩戴了一条钻石项链。
2. 2. The diamondback is one of the most valuable gems in the world.
   钻石背是世界上最珍贵的宝石之一。
3. 3. He bought a diamondback for his wife as a token of love.
   他为妻子买了一颗钻石背作为爱的纪念品。