tundra

简明释义

英[ˈtʌndrə]美[ˈtʌndrə]

n. [生态] 苔原；[地理] 冻原；冻土地带

复 数 t u n d r a s

英英释义

单词用法

同义词

反义词

例句

1.Skaltje spends much of the winter on the tundra with his herd.

斯格尔特亚在冻原地带和鹿群一起度过冬天的大部分时间。

2.Above the tree line there is a zone that is generally called alpine tundra.

林木线上方有一个区域，通常被称为高山苔原。

3.The Tundra Times, a weekly newspaper in Alaska, ceased publication this week.

阿拉斯加的周报——《苔原时报》于本周停刊。

4.Because of the cold temperatures, the tundra has two layers: top layer, which is called the active layer, is frozen in the winter and spring, but thaws in the summer.

由于寒冷的气温，冻土带有两层：最上面的一层被称为活动层，在冬季和春季被冻结，但在夏季解冻。

5.Changed the class attribute value of the tag to tundra.

将标签的类属性值更改为tundra。

6.The Sami has long used the tents as portable shelters—their wide bases and forked poles enable them to withstand the winds on the Arctic tundra.

长期以来，萨米族人一直把这些帐篷用作便携式避难所——宽大的底部和叉状的支杆使它们能够承受住北极冻原上的大风。

7.The size of the shrubs has increased and shrub cover has spread to what was previously shrub-free tundra.

灌木的大小增加了，以及灌木的覆盖范围扩展到以前没有灌木的苔原上。

8.Warming is also reinforced when shrubs move northward and replace lower tundra plants.

气候变暖的另一铁证是灌木北移取代了苔原植物。

9.The Arctic fox is well adapted to live in the cold conditions of the tundra.

北极狐很好地适应了生活在寒冷的苔原环境中。

10.Scientists study the tundra to understand its unique ecosystem.

科学家研究苔原以了解其独特的生态系统。

11.The permafrost in the tundra prevents deep-rooted plants from growing.

在苔原中的永久冻土阻止了深根植物的生长。

12.During summer, the tundra experiences a brief period of growth when flowers bloom.

在夏季，苔原经历了一个短暂的生长时期，花朵绽放。

13.Migratory birds visit the tundra during the breeding season.

迁徙鸟类在繁殖季节访问苔原。

作文

The world is filled with diverse ecosystems, each with its unique characteristics and inhabitants. One of the most fascinating and extreme environments is the tundra, a biome that exists in the coldest regions of the Earth. The tundra (冻土带) is known for its harsh climate, limited vegetation, and unique wildlife. In this essay, I will explore the features of the tundra, its ecological significance, and the challenges it faces due to climate change.The tundra is primarily found in the Arctic and Antarctic regions, characterized by long, frigid winters and short summers. The ground is often frozen, creating a layer known as permafrost. This permafrost prevents trees from growing, resulting in a landscape dominated by mosses, lichens, and low shrubs. Despite the severe conditions, the tundra is home to various species adapted to survive in this environment. Animals such as caribou, arctic foxes, and snow owls have developed unique adaptations to cope with the cold and scarce food resources.One of the most remarkable aspects of the tundra is its brief but vibrant summer. During this time, the sun shines almost continuously, allowing the plants to grow rapidly. The melting snow reveals a colorful carpet of wildflowers, which attracts migratory birds and insects. This seasonal burst of life is crucial for the ecosystem, as it supports a wide range of animals that depend on these resources for survival.Ecologically, the tundra plays a vital role in regulating the Earth's climate. It acts as a carbon sink, storing large amounts of carbon dioxide in the form of frozen organic matter. However, as global temperatures rise, the permafrost is beginning to thaw, releasing this stored carbon back into the atmosphere. This process contributes to climate change and poses a significant threat to the delicate balance of the tundra ecosystem.In addition to climate change, the tundra faces other environmental challenges, including oil exploration and mining activities. These human activities disrupt the fragile habitats and can lead to pollution, which further endangers the wildlife that call the tundra home. Conservation efforts are essential to protect this unique biome and its inhabitants.In conclusion, the tundra is a remarkable and delicate ecosystem that showcases the resilience of life in extreme conditions. Understanding and protecting this unique environment is crucial for maintaining biodiversity and combating climate change. As we continue to face environmental challenges, it is imperative that we take action to preserve the tundra and ensure its survival for future generations.

这个世界充满了多样的生态系统，每个生态系统都有其独特的特征和居民。其中一个最迷人且极端的环境是冻土带，这是地球上存在的生物群落之一。冻土带(tundra)以其恶劣的气候、有限的植被和独特的野生动物而闻名。在这篇文章中，我将探讨冻土带的特点、其生态重要性以及由于气候变化所面临的挑战。冻土带主要分布在北极和南极地区，特征是漫长而寒冷的冬季和短暂的夏季。地面通常是冰冻的，形成一种称为永久冻土的层。这种永久冻土阻止树木生长，导致景观以苔藓、地衣和低矮灌木为主。尽管条件严酷，冻土带仍然是各种适应这种环境生存的物种的家园。驯鹿、北极狐和雪鸮等动物发展出了独特的适应能力，以应对寒冷和稀缺的食物资源。冻土带最引人注目的方面之一是它短暂但充满活力的夏季。在这个时候，阳光几乎持续照射，使植物迅速生长。融化的雪揭示出五彩斑斓的野花地毯，吸引了迁徙鸟类和昆虫。这种季节性的生命迸发对生态系统至关重要，因为它支持着依赖这些资源生存的广泛动物。在生态上，冻土带在调节地球气候方面发挥着重要作用。它作为碳汇，储存大量以冰冻有机物形式存在的二氧化碳。然而，随着全球气温的上升，永久冻土开始融化，将储存的碳释放回大气中。这一过程加剧了气候变化，并对冻土带生态系统的微妙平衡构成了重大威胁。除了气候变化，冻土带还面临其他环境挑战，包括石油勘探和采矿活动。这些人类活动破坏了脆弱的栖息地，并可能导致污染，进一步危及那些称冻土带为家的野生动物。保护措施对于保护这一独特的生物群落及其居民至关重要。总之，冻土带是一个非凡而脆弱的生态系统，展示了生命在极端条件下的韧性。理解和保护这一独特环境对于维持生物多样性和应对气候变化至关重要。随着我们继续面临环境挑战，采取行动保护冻土带并确保其为后代生存是至关重要的。