ragweed

简明释义

英[ˈræɡwiːd]美[ˈræɡwiːd]

n. 豚草属

英英释义

单词用法

同义词

反义词

例句

1.Subjects received six doses of TOLAMBA over six weeks prior to the start of the 2006 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。

2.Huber, D. M. , Cheng, M. W. , and Winsor, B. A. 2005. Association of severe Corynespora root rot of soybean with glyphosate-killed giant ragweed. Phytopathology 95, S45.

大豆剧烈棒抱叶斑病根烂与草甘膦杀死超巨豚草的关联。植物病理学95，S45。

3.However, from the regional data, we gained important insights into solutions that would minimize the risk of enrolling a large number of patients who do not have ragweed-specific disease.

然而，从地域性的资料来看，我们获得了重要的启示，其解决方法是将入选大量未曾患过豕草特异性疾病患者的风险降到最小。

4.Conclusion Significant difference exists between the extract of artemisia pollen and ragweed pollen, with the former being more complicated.

结论艾蒿花粉与豚草花粉提取液蛋白组分差异较大，前者更复杂；

5.Atopy was defined as a positive skin-prick test to mites, cat, Alternaria, Cladosporium, grass, birch, Parietaria, olive, or ragweed.

特应性定义为对螨类、链格孢属、分子孢子菌属、草、桦木、墙草属、橄榄或豚草属皮肤划痕实验阳性。

6.For 75 percent of those 35 million, ragweed is the primary allergen, he added.

对于这35,000,000人的75%来说，豚草是首要过敏原，他补充道。

7.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。

8.Many people are allergic to ragweed, especially in late summer and fall.

许多人对豚草过敏，尤其是在夏末和秋季。

9.The pollen from ragweed can travel long distances in the air.

来自豚草的花粉可以在空气中传播很远的距离。

10.During the peak season, my allergies flare up due to ragweed pollen.

在高峰季节，由于豚草花粉，我的过敏症状加重。

11.Farmers often try to control ragweed growth to reduce allergy cases in their communities.

农民们常常试图控制豚草的生长，以减少他们社区中的过敏病例。

12.Some herbal remedies claim to help alleviate symptoms caused by ragweed allergies.

一些草药疗法声称可以帮助缓解由豚草过敏引起的症状。

作文

Ragweed, or 豚草, is a common plant found in many parts of North America. It is notorious for its role in causing seasonal allergies, particularly in the late summer and early fall. The pollen from ragweed is lightweight and can travel long distances through the air, affecting millions of people who are sensitive to it. This makes ragweed one of the most significant contributors to allergic rhinitis, often referred to as hay fever. The life cycle of ragweed begins with its germination in the spring. As the weather warms, the plant grows rapidly, reaching heights of up to four feet. By mid-summer, ragweed produces small, green flowers that are not particularly noticeable but are highly effective at producing pollen. Each plant can release billions of pollen grains into the air, which can cause widespread discomfort for allergy sufferers. One of the challenges with ragweed is its resilience and ability to thrive in various environments. It often grows in disturbed soils, such as those found along roadsides, in fields, and even in gardens. This adaptability means that controlling ragweed populations can be difficult. Efforts to manage this plant often involve both mechanical and chemical methods, but these can be resource-intensive and may not always yield successful results. The impact of ragweed on public health is significant. Many individuals experience symptoms such as sneezing, nasal congestion, itchy eyes, and fatigue during peak pollen seasons. For those with asthma or other respiratory conditions, exposure to ragweed pollen can exacerbate their symptoms, leading to increased medical visits and hospitalizations. As climate change continues to affect weather patterns, the growing season for ragweed may extend, potentially increasing the duration of allergy seasons. In addition to its health implications, ragweed also poses challenges for agriculture. Farmers often struggle to control this invasive species, as it competes with crops for nutrients and water. The presence of ragweed in agricultural fields can lead to reduced yields and increased costs associated with weed management. Therefore, understanding how to manage and mitigate the effects of ragweed is crucial for both public health and agricultural productivity. There are several strategies that individuals can employ to minimize their exposure to ragweed pollen. Staying indoors on high pollen days, using air purifiers, and keeping windows closed can help reduce indoor pollen levels. Additionally, wearing masks when outdoors during peak pollen times can provide some protection. For those who suffer from severe allergies, consulting with a healthcare professional about treatment options, including antihistamines or allergy shots, is advisable. In conclusion, ragweed is more than just a common weed; it is a significant environmental and health concern. Understanding its biology, growth patterns, and impacts on human health is essential for managing its presence in our ecosystems. By taking proactive measures, we can reduce the burden of ragweed allergies and protect both our health and the agricultural landscapes we rely on. As we continue to learn more about this resilient plant, we can develop better strategies to coexist with it while minimizing its negative effects.

豚草是一种常见植物，广泛分布于北美的许多地区。它因在夏末和秋初引起季节性过敏而臭名昭著。豚草的花粉轻便，能够在空气中传播很远，影响数百万对其敏感的人。这使得豚草成为引起过敏性鼻炎（通常称为花粉热）的最重要因素之一。 豚草的生命周期从春季的发芽开始。随着天气转暖，植物快速生长，达到四英尺的高度。到夏中旬，豚草会产生小而绿色的花朵，这些花朵并不特别显眼，但却极其有效地产生花粉。每株植物可以释放数十亿颗花粉颗粒到空气中，这可能会导致过敏患者普遍的不适。 豚草的一个挑战是它的韧性和在各种环境中生存的能力。它通常生长在扰动的土壤中，例如道路旁、田野甚至花园中。这种适应性意味着控制豚草种群可能会很困难。管理这种植物的努力通常涉及机械和化学方法，但这些方法可能资源密集，并且不总能取得成功的结果。 豚草对公共健康的影响是显著的。许多人在高峰花粉季节经历诸如打喷嚏、鼻塞、眼睛瘙痒和疲劳等症状。对于那些患有哮喘或其他呼吸系统疾病的人来说，接触豚草花粉可能会加重他们的症状，导致就医和住院的增加。随着气候变化继续影响天气模式，豚草的生长季节可能会延长，从而可能增加过敏季节的持续时间。 除了健康影响外，豚草还对农业构成挑战。农民常常难以控制这种入侵物种，因为它与作物争夺营养和水分。豚草在农业田地中的存在可能导致产量下降和与杂草管理相关的成本增加。因此，了解如何管理和减轻豚草的影响对于公共健康和农业生产力至关重要。 个人可以采取几种策略来减少对豚草花粉的暴露。在高花粉日待在室内、使用空气净化器和关闭窗户可以帮助降低室内花粉水平。此外，在高峰花粉时段户外活动时佩戴口罩也可以提供一些保护。对于那些严重过敏的人，建议咨询医疗专业人员以了解治疗方案，包括抗组胺药或过敏针。 总之，豚草不仅仅是一种常见杂草；它是一个重要的环境和健康问题。了解其生物学、生长模式及对人类健康的影响对于管理其在生态系统中的存在至关重要。通过采取主动措施，我们可以减少豚草过敏的负担，保护我们的健康和我们所依赖的农业景观。随着我们继续了解这种顽强的植物，我们可以制定更好的策略来与之共存，同时尽量减少其负面影响。