tuber of dwarf lilyturf

例句：

1. 1. The tulips have a beautiful tuber that grows underground.
   郁金香有美丽的地下块茎。
2. 2. The potato is a tuber that grows in the ground.
   土豆是生长在地里的块茎。
3. 3. The onion has a bulbous root that can be used as a vegetable.
   洋葱有一个球形的根部，可以作为蔬菜使用。