单词 | common ragweed |
释义 | common ragweed (extremely rare) n WORD FAMILY common ragweed n annual weed with finely divided foliage and spikes of green flowers; common in North America; introduced elsewhere accidentally Syn|Hyper Ambrosia artemisiifolia ambrosia, bitterweed, ragweed any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma |
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