| 单词 | Ambrosia trifida |
| 例句 | Ambrosia trifida L. Achenes hard, brown, more or less mottled, top-shaped, 7–8 mm. besides the stout beak 2–3 mm. long, sides with 5 stout ridges terminating in 5 short teeth. Seeds of Michigan Weeds Bulletin 260, Michigan State Agricultural College Experiment Station, Division of Botany, March, 1910 |
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