ptomatine

例句：

1. 1.The ptomatine crystals were so beautiful that they attracted many visitors.
   这些水晶如此美丽，吸引了许多游客。
2. 2.The ptomatine crystals were so beautiful that they attracted many visitors.
   这些水晶如此美丽，吸引了许多游客。
3. 3. The ptomatine crystals were so beautiful that they attracted many visitors.
   这些水晶如此美丽，吸引了许多游客。