| 单词 | downy mildew |
| 释义 | downy mildew downy mildew n.（名词）A disease of plants caused by fungi of the order Peronosporales and characterized by gray, velvety patches of spores on the lower surfaces of leaves.霜霉病：霜霉科真菌引起的植物疾病，患此病的植物叶背面有一簇簇的灰色绒状胚芽 |
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