One reason they are so hard to kill is that their roots spread easily as do their white, soft, seed-filled tops.

蒲公英很难消灭的其中一个原因是，它们的根和布满毛茸茸种子的白色顶端极易扩散蔓延。

Their roots spread deep and wide, allowing for  more effective collection of water and nutrients.

它们的根深而广，可以更有效地收集水分和养分。