spikeweed

例句：

1. 1. The farmer sprayed the fields with herbicide to kill the spikeweed.
   农民用除草剂喷洒田野以杀死刺蓟。
2. 2.The children were playing in the garden when they stumbled upon a patch of poisonous spikeweed.
   孩子们在花园里玩耍时，他们偶然发现了一片有毒的刺蓟。
3. 3. The farmers are trying to control the spread of this noxious plant known as spikeweed.
   农民们正在努力控制这种被称为刺蓟的有害植物的传播。