n.凍原，苔原(樹木不生，底土常年冰凍的北極地區(qū))

復(fù)數(shù)：tundras

牛津詞典

noun

凍原，苔原（樹木不生，底土常年冰凍的北極地區(qū)）the large flat Arctic regions of northern Europe, Asia and N America where no trees grow and where the soil below the surface of the ground is always frozen

柯林斯詞典

凍原;苔原Tundra is one of the large flat areas of land in the north of Europe, Asia, and America. The ground below the top layer of soil is always frozen and no trees grow there.

雙語例句

The Tundra Times, a weekly newspaper in Alaska, ceased publication this week. 阿拉斯加的周報(bào)《苔原時報(bào)》本周?？恕?/p>

Through its own theme, tundra, it provides a design and color scheme common to all its widgets. 通過自身的主題tundra，它為其所有的小部件提供了通用的設(shè)計(jì)和顏色模式。

A plant that grows more than three feet ( about a meter) is unusual on the tundra. 一種植物若能長得超過了三英尺，這在凍土帶上就是很不平常的了。

Until recently, the changing seasons on the tundra were seen only by a few Eskimo hunters and explorers. 不久前，也只有極少數(shù)的愛斯基摩的獵手和探險(xiǎn)家才能深究到凍土帶上的寒來暑往冬去春來。

It is this thin layer of active soil that supports all living things on the tundra. 正是這被太陽曬暖了蘇醒過來的薄薄的一層土壤養(yǎng)活著凍土帶上的一切生物。

The animal life on the tundra is unusually rich for an environment that seems so harsh. 在這種非常惡劣的環(huán)境中，凍土帶上動物的生活卻非常充實(shí)。

Few birds actually live on the tundra. 實(shí)際上幾乎沒有鳥類生活在凍土帶上。

For nine months of the year, the tundra is a dark, seemingly lifeless wild land. 每年長達(dá)9個月，凍土帶都是一塊看上去毫無生機(jī)的荒涼的土地。

Oil from beneath the tundra is very important to the nations 'development. 來自凍土帶下面的石油對美國的發(fā)展至關(guān)重要。

By the end of August the breath of winter returns, and by mid-September the tundra is white again. 到8月底，冬天的氣息又返回來了，到了9月中旬這凍土帶又是冬天了。

Any increase or decrease in the population of one species may affect all other species on the tundra. 任何一個物種在數(shù)量上的增加或減少都會影響到凍土帶上所有的其他物種。

Long periods of darkness and bitter cold are the major threats to life on the tundra. 長期的黑暗和刺骨的嚴(yán)寒對在凍土帶上生活是兩大最主要的威脅。

Spring in northern Canada means the migration of three million caribou across the arctic tundra. 春天的到來帶來了加拿大北部三百萬頭馴鹿的大遷徙。

North American subspecies of tundra swan having a soft whistling note. 凍原天鵝的北美洲亞種，以其柔和的鳴叫著名。

I once tracked a polar bearacross the Arctic tundra. 我曾在北極圈里追蹤過北極熊。

Frost-flecked tundra pools dot the landscape of Canada's North Yukon National Park. 斑點(diǎn)狀霜凍的苔原水池點(diǎn)綴了加拿大北育空公家公園的風(fēng)景。

The arctic tundra is at the top of the world around the North Pole. 北極凍原是指北極點(diǎn)周邊的地區(qū)，是世界最高的地方。

A solar phenomenon known as a sundog arcs over the tundra in Churchill, Manitoba, Canada. 加拿大馬尼托巴省丘吉爾凍原上出現(xiàn)了幻日光弧這種日光現(xiàn)象。

Human beings fill every ecological niche on the planet, from the icy tundra to the tropical rain forests to the deserts. 從凍土地帶到熱帶雨林，再到沙漠，人類已填滿了這個星球的每一個生態(tài)位。

Are one of the most hardy birds, habitat in the northern tundra and boreal forests, and barren mountains and desert. 是最堅(jiān)強(qiáng)的鳥類，棲息地北部苔原和寒帶森林和荒山和沙漠。

If you keep going up, you'll emerge on the alpine tundra. 如果你登的再高一點(diǎn)，你將進(jìn)入高山苔原地帶。

Above the tree line there is a zone that is generally called alpine tundra. 在樹木線上有一個區(qū)域通常被稱為高山凍原。

All along this uninhabited shoreline, sea islands, salt marshes, and sandy beaches provide a perfect resting place for Tundra swans, coots, gallinules, and other water birds. 在這一整條杳無人跡的海岸線上，海島、鹽沼和沙灘為凍原天鵝、黑鴨、黑水雞和其他水鳥提供了一個絕佳的棲息所。

Few plants grow in tundra regions. 苔原地區(qū)很少有植物生長。

The transition from forest to treeless tundra on a mountain slope is often a dramatic one. 在一個山坡上，從一個樹林過渡成為一個沒有樹木的凍原常常是戲劇性的變化。

Swan that nests in tundra regions of the New and Old Worlds. 新舊**凍原地區(qū)筑巢的天鵝。

Desert sunrise, Arctic tundra, nighttime urban streets: the look of your footage defines the mood. 您的英尺長度神色定義了心情。

As the Arctic tundra heats up, carbon stored in its depths begins to move. 隨著北極凍土帶溫度升高，深藏于其下的碳開始移動。

The altiplano tundra is a potential source of the formation and preservation of nature gas hydrate. 高原凍土帶是天然氣水合物生成和保存的潛在源區(qū)。

How will the life cycles of the tundra be affected? 那么，凍土帶的生活周期會受到什么影響呢？

英英釋義

noun

a vast treeless plain in the Arctic regions where the subsoil is permanently frozen