mother pearl shellfish

例句：

1. 1. The mother pearl is asymbol of purity and beauty.
   珍珠母象征着纯洁与美丽。
2. 2. The shellfish are deliciousand nutritious.
   这些贝类既美味又营养。
3. 3. The mother pearl is saidto have magical powers.
   据说珍珠母具有神奇的力量。