1. pollen of the ragweed plant is a common allergen. 豚草属植物的花粉是常见的过敏原。
2. The phenological period changes of Poa pratensis L. and ragweed was investigated through comparative experiment. 通过对比实验分析了草地早熟禾与豚草物候期的变化;
3. Persons may develop allergies after exposure to almost any substance, such as cat hair, ragweed , or house dust. Doctors do not know why only some individuals develop allergies. 有人几乎在接触任何物质后,如猫毛,豚草,室内灰尘,都会产生过敏反应。医生不知道为什么只有一部分人才出现过敏反应。
英英解释
n.
1. widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to c
2. any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce hig