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菊科豚草属植物是世界上讨厌的变态反应症病原植物,也是农田里的恶性杂草。它原产北美,其中豚草(Ambrosia artemisiifolia)和三裂叶豚草(A.trifida),从三十年代末相继传到我
Compositae Rachyra is the world’s nasty allergens pathogens, but also a vicious weed in the farmland. It is native to North America where Ambrosia artemisiifolia and A. trifida spread to me from the late 1930s