sparganum spargana

例句：

1. 1. The spider's web is a fascinating example of natural ingenuity.
   蜘蛛网是自然巧思的一个引人入胜的例子。
2. 2. The sparganum was a rare and valuable species.
   这个海绵是稀有且有价值的物种。
3. 3. The sparganum has been used as a medicinal substance for centuries.
   这种海绵被用作药物成分几个世纪了。