ragweed
英 [ˈræɡwiːd]
美 [ˈræɡwiːd]
n. 豚草(北美植物，绿色小花含大量花粉，可引起枯草热)
COCA.33331
牛津词典
noun
- 豚草（北美植物，绿色小花含大量花粉，可引起枯草热）
a N American plant with small green flowers that contain a lot of pollen , which causes hay fever in some people
英英释义
noun
- any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
- widespread European weed having yellow daisylike flowers
双语例句
- Studies on cytomorphology of common ragweed stamen abortion induced by Ethrel
乙烯利诱导豚草雄蕊败育的细胞形态学观察 - Ragweeds reduced the individual number and community diversity of soil insects. According to the results of monthly ANOVA and LSD, in August and September the individual number and diversity indices of soil insects in the control plot without ragweeds were significantly higher than those in ragweed plots.
豚草降低了土壤昆虫的个体数量和群落多样性，根据逐月方差分析和多重比较，8月和9月对照样地土壤昆虫个体数量和多样性指数均显著高于豚草样地。 - The main findings as follows: 1. The effect of the coarse material coverage which was from the different parts of False ragweed on the germination and growth of cucumber was different.
主要研究结果如下：1.假苍耳不同部位粗粉物覆盖对黄瓜生长发育的作用不同。 - Study on Community Structure and Dynamics of Insects in a Ragweed Protecting Habitat
保护地豚草昆虫群落结构及动态研究 - Therefore, the main ways of control of ragweed especially biological controls were reviewed in order to found integrative control system of ragweed.
本文对豚草防治的主要方法进行了综合论述，为豚草综合防治体系的建立提供参考。 - Ragweed ( Ambrosia artemisiifolia), which is recognized as a kind of malignant invasion weed, and it has been spreading in the world. It could make enormous threat on the ecological safety, development of agriculture and human health in the invaded areas.
豚草是世界性恶性入侵杂草，在世界各地广泛蔓延传播，对入侵地的生态安全、农牧业生产及人类健康构成巨大威胁。 - Subjects received six doses of TOLAMBA over six weeks prior to the start of the2006 ragweed season.
受试者在2006年豕草季节开始之前超过6周时接受6个剂量的TOLAMBA治疗。 - The impacts of ragweed on soil animals in reproductive period exceeded that in vegetative period, that of A. artemisiifolia exceeded that of A. trifida, that in pure ragweed community exceeded that in the community with ragweed and other plants.
豚草对土壤动物的影响，生殖生长期大于营养生长期，普通豚草大于三裂叶豚草，豚草纯群落大于豚草与其它植物混生群落。 - SIT group, in which 68 patients were treated with ragweed SIT for six months before July for 3 years.
用豚草变应原进行季节前6个月的抗原特异性免疫治疗，疗程为3年。 - According to this system, the risk value for giant ragweed was 83 and it was considered as a quarantine pest with high risk.
应用该体系对三裂叶豚草进行了风险评估，得出其风险值为83，属高度危险的检疫性有害生物。