| 单词 | 顶端扁平 |
| 释义 | 〔umbel〕A flat-topped or rounded flower cluster in which the individual flower stalks arise from about the same point, as in the geranium, milkweed, onion, and chive.伞形花序：单个花茎大致上总从同一个地方长出的，顶端扁平或圆的花序，如天笠葵、乳草、洋葱和细香葱 |
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