| 单词 | black ring |
| 释义 | black ringnoun variants or less commonly black ring spot 1 : a virus disease of cabbage and other members of the cabbage family (Cruciferae) that is characterized by necrotic, dark, and often sunken rings on the leaf surface 2 : a virus disease of the tomato that is characterized in its initial stage by numerous small black rings on young leaves |
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