| 单词 | ragweed |
| 释义 | Word Frequency ragweed(ˈræɡˌwiːd) noun any plant of the chiefly North American genus Ambrosia, such as A. artemisiifolia (common ragweed): family Asteraceae (composites). Their green tassel-like flowers produce large amounts of pollen, which causes hay fever Also called: ambrosia |
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