珍珠贝

例句：

1. 1. The pearl oyster is the most valuable type of oyster in the world.
   珍珠牡蛎是世界上最有价值的牡蛎类型。
2. 2. She bought a pearl necklace as a gift for her mother's birthday.
   她买了一条珍珠项链作为母亲生日的礼物。
3. 3. The pearl industry is one of the fastest-growing industries in the world.
   珍珠产业是世界上增长最快的行业之一。