scentless mayweed

例句：

1. 1.The scentless mayweed is a common weed in the park.
   公园里的无香马尾草是一种常见的杂草。
2. 2.The farmers were trying to control the scentless mayweed that had invaded their fields.
   农民们正在试图控制入侵他们田地的无香马尾草。
3. 3.The scentless mayweed was so abundant that it covered the entire field.
   无香马尾草如此丰富，以至于覆盖了整个田野。