pollen

简明释义

英[ˈpɒlən]美[ˈpɑːlən]

n. 花粉

【名】 （Pollen）波伦（人名）

复 数 p o l l e n s

英英释义

单词用法

同义词

反义词

例句

1.The snow turns pink because of microscopic algae known as Chamydomonas nivalis, leaves and pollen of the whitebark pine.

雪边分红是由一种只能通过显微镜才能看到的藻类和白皮巴尔干松的叶子、花粉引起的。

2.Avoid trips to the country while the pollen count is high.

花粉计数高时，尽量避免去乡村旅行。

3.The type of vegetation in a specific region is determined by identifying and counting the various pollen grains found there.

一个特定地区的植被类型是通过识别和计算那里发现的各种花粉粒来确定的。

4.Then there is fossilized pollen, from low shrubs and grasses that once grew in the Sahara.

还有一些石化的花粉，来自于曾经生长在撒哈拉的小灌木丛和草丛。

5.The insecticide occurs throughout the plant, including its pollen.

这种杀虫剂存在于整个植物中，包括它的花粉。

6.The structure of cycads male cones is quite consistent with the wind dispersal of pollen, clouds of which are released from some of the larger cones.

苏铁雄球果的结构与花粉的风传播相当一致，花粉云从一些较大的球果中释放出来。

7.Change the filters on your air-conditioning vents. These filters are dust and pollen "magnets".

更换空调通风口的过滤器。这些过滤器是灰尘和花粉的“吸铁石”。

8.The pollen can then be separated from the rest of the catkin by sieving through cheesecloth or fine screen.

以粗纱布或细筛过筛，便可将花粉同柔荑花序的其它部分分开。

9.The air is pure, with neither pollution nor pollen.

空气纯净，没有污染也没有花粉。

10.Some flowers have bright colors to attract pollinators that help spread their pollen.

一些花朵有鲜艳的颜色，以吸引帮助传播其花粉的授粉者。

11.Plants rely on pollen for reproduction, as it helps fertilize their seeds.

植物依靠花粉进行繁殖，因为它有助于使种子受精。

12.Bees collect pollen from flowers to make honey.

蜜蜂从花朵中收集花粉来制作蜂蜜。

13.The pollen from certain trees can trigger allergic reactions in sensitive individuals.

某些树木的花粉会引发敏感个体的过敏反应。

14.During spring, many people suffer from allergies due to high levels of pollen in the air.

在春天，许多人因空气中高含量的花粉而遭受过敏。

作文

Pollen is a vital component of the reproductive process in flowering plants. It consists of tiny grains that are produced by the male parts of flowers, specifically the anthers. These grains contain the male gametes, which are necessary for fertilization to occur. When pollen is transferred from the male part of a flower to the female part, known as the stigma, fertilization can take place, leading to the formation of seeds. This process is essential not only for the propagation of plant species but also for the production of fruits and vegetables that we consume daily.The significance of pollen (花粉) extends beyond just plant reproduction. It plays a crucial role in the ecosystem, supporting various forms of wildlife, particularly pollinators such as bees, butterflies, and birds. These creatures are attracted to flowers by their vibrant colors and sweet scents, and while they feed on nectar, they inadvertently collect pollen (花粉) on their bodies. As they move from one flower to another, they facilitate the transfer of pollen (花粉), ensuring that plants can reproduce and thrive.However, pollen (花粉) is not without its challenges. For many people, especially those with allergies, the arrival of spring often brings discomfort due to the high levels of pollen (花粉) in the air. Symptoms such as sneezing, runny nose, and itchy eyes can make it difficult for individuals to enjoy the beauty of blooming flowers. This condition, known as hay fever or allergic rhinitis, occurs when the immune system overreacts to the presence of pollen (花粉) from trees, grasses, and weeds.Despite these challenges, the benefits of pollen (花粉) far outweigh the drawbacks. For instance, pollen (花粉) is not only important for food production but also contributes to the diversity of our ecosystems. Many plants rely on specific pollinators, and the decline of these species due to habitat loss and pesticide use can have devastating effects on pollen (花粉) dispersal and, consequently, on food supplies.Moreover, pollen (花粉) has been studied for its potential health benefits. Some research suggests that pollen (花粉) may have antioxidant properties and could help boost the immune system. Additionally, certain types of pollen (花粉) are used in dietary supplements, promoting overall health and wellness.In conclusion, pollen (花粉) is an essential element of nature that facilitates plant reproduction and supports biodiversity. While it can pose challenges for those with allergies, its ecological and health benefits cannot be overlooked. Understanding the role of pollen (花粉) in our environment encourages us to appreciate the intricate relationships between plants, animals, and humans. By protecting pollinator habitats and promoting sustainable practices, we can ensure that pollen (花粉) continues to play its critical role in our world for generations to come.

花粉是开花植物繁殖过程中的一个重要组成部分。它由微小的颗粒组成，这些颗粒由花的雄性部分，特别是花药产生。这些颗粒包含雄性配子，是使受精发生所必需的。当花粉从花的雄性部分转移到雌性部分，即柱头时，受精就可以发生，从而形成种子。这个过程不仅对植物种类的繁衍至关重要，而且对我们每天消费的水果和蔬菜的生产也至关重要。花粉的意义不仅仅限于植物繁殖。它在生态系统中发挥着关键作用，支持各种野生动物，特别是蜜蜂、蝴蝶和鸟类等授粉者。这些生物被花朵的鲜艳颜色和甜美香气所吸引，当它们以花蜜为食时，意外地在身体上收集了花粉。当它们从一朵花移动到另一朵花时，它们促进了花粉的转移，确保植物能够繁殖和繁荣。然而，花粉并非没有挑战。对于许多人来说，尤其是那些有过敏症的人，春天的到来常常带来不适，因为空气中高浓度的花粉。流鼻涕、打喷嚏和眼睛发痒等症状会使人们难以享受盛开的花朵之美。这种情况被称为花粉热或过敏性鼻炎，发生在免疫系统对树木、草和杂草的花粉过度反应时。尽管存在这些挑战，花粉的好处远远超过缺点。例如，花粉不仅对食品生产至关重要，而且对我们生态系统的多样性也有贡献。许多植物依赖特定的授粉者，而由于栖息地丧失和农药使用导致这些物种的减少，会对花粉的传播造成毁灭性的影响，从而影响食品供应。此外，花粉也被研究其潜在的健康益处。一些研究表明，花粉可能具有抗氧化特性，并可能有助于增强免疫系统。此外，某些类型的花粉用于膳食补充剂，促进整体健康和幸福。总之，花粉是自然界中的一个重要元素，促进植物繁殖并支持生物多样性。虽然它对过敏患者可能构成挑战，但其生态和健康益处不容忽视。理解花粉在我们环境中的作用使我们更能欣赏植物、动物和人类之间复杂的关系。通过保护授粉者栖息地和促进可持续实践，我们可以确保花粉在我们的世界中继续发挥其关键作用，造福未来几代人。