common knotgrass

例句：

1. 1.The common knotgrass grows in the grasslands of the northwest.
   普通结草生长在西北的草原上。
2. 2.The common knotgrass is a valuable resource for wildlife.
   普通结草是野生动物的重要资源。
3. 3.The common knotgrass has been used as a medicinal plant for centuries.
   普通结草被用作数百年的药用植物。