Helvellales

例句：

1. 1. The Helvellales are a group of plants that grow in the Mediterranean region.
   Helvellales是地中海地区的一类植物。
2. 2. The Helvellales play an important role in the ecosystem.
   Helvellales在生态系统中起着重要的作用。
3. 3. The Helvellales have been used for medicinal purposes for centuries.
   Helvellales自古以来就被用于药用。