ragweed
n. 豚草属
例句
Ragweed pioneers idle fields.
豚草常是闲置耕地的先锋植物。
Ragweed that seems to be knitted Out of yellow wool
豚草好像是由黄色的羊毛
Dating sediments using ragweed and nuclear fallout.
利用豚草及核放射物对沉积物进行年代推定。
