Savannas typically experience a rather prolonged dry season.
稀树草原通常经历一个相当漫长的旱季。
Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees or shrubs.
"热带稀树草原位于热带地区，海拔较低，是一种稳定的生态系统，由广阔的草地和稀疏分布其中的树木或灌木组成，有些地区湿润，有些地区干燥。
Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters.
热带草原的年降雨量在1000毫米到2000毫米之间。
Some savannas occur on wet, waterlogged soils; others on dry, sandy, well-drained soils.
一些稀树大草原生长在潮湿、涝渍的土壤上；其它则在干燥、多沙、排水良好的土壤上。
Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly.
实验表明，如果美洲稀树大草原没有发生火灾，物种组成将发生显著变化。
This may seem contradictory, but it only means that extreme soil conditions, either too wet or too dry for forests, are satisfactory for savannas.
这看起来很矛盾，但这就意味着对于森林来说，过湿或过干的极端土壤条件才适合热带草原。
Such conditions prevail throughout much of northern South America and Cuba, but many Central American savannas, as well as coastal areas of Brazil and the island of Trinidad, do not fit this pattern.
这种情况普遍存在于南美洲北部和古巴的大部分地区，但许多中美洲大草原以及巴西沿海地区和特立尼达岛，都不符合这种模式。
This is one of the largest intact savannas in Africa.
这里是非洲最大最完整的热带草原。
"This is one of the largest intact savannas in Africa," he said.
“这里是非洲最大最完整的热带草原，”埃尔坎说。
Therefore the jungles and the savannas know of no juvenile delinquency!
因此，丛林和荒原里没有“少年犯罪。”
Far, far away, on the savannas and in the forests of Africa is another reality.
人们也许不会去想，这些乏味的数字来自于，在遥远的非洲大草原和丛林中正在上演的残酷现实。
Black mambas live in the savannas and rocky hills of southern and eastern Africa.
黑曼巴生活在非洲东南部的干燥大草原和岩石山丘上。
Temperatures cooled and the land became dries. Savannas were forming and forests were shrinking.
气温变凉，大地变干，热带稀树草原开始形成，森林渐渐缩。
In the expansive savannas there, visitors spend four days watching the harvest, eating lunchwith farmers.
在广袤无垠的稀树草原上，游客将有四天的时间观看收割现场，与农夫们共进午餐。
In the forests and savannas where our species got its start, being able to reach up and pluck fruit trees was a good thing.
生长在森林和热带大草原上，因为果树上的食物味美可口，人类的祖先为了摘食而慢慢习惯于直立行走，这是件伟大的事情。
Some people say that because of global warming, forests around savannas may start taking over the savannas, and some say the opposite.
有些人说，由于全球气候变暖，稀树大草原周围的森林可能开始取代稀树大草原，也有的人提出相反的看法。
Conventional wisdom says our earliest ancestors first stood up on two legs when they moved out of the forest and into the open savannas.
传统观点认为当人类最早的祖先最初从丛林迁移到平原时，开始用两条腿站立。
The floristic component of Yuanmou vegetation distinctly consists of the large part of tropical elements, in which some genera connect to the current typical savannas.
植被的植物区系组成明显以热带成分为主，其中有些属与近代典型热带草原有联系。
Despite the constancy of these primal urges human culture has experienced upheaval after upheaval in the period since our hunter-gatherer forebears roamed the savannas.
尽管这些根本的冲动是恒定的，自从我们的狩猎—采集祖先在草原上活动以来，人类文化却经历了一次又一次的大变动。
But the Smithsonian Institution recently released more than 200,000 wildlife images captured by automated cameras hidden in forests, mountains and savannas across the globe.
但是，最近史密森学会却公布了20万张野生动物影像，这些影像是用隐藏在全球各地森林、丛山和热带稀树草原的自动相机拍摄到的。
But the Smithsonian Institution recently released more than 200, 000 wildlife images captured by automated cameras hidden in forests, mountains and savannas across the globe.
但是，最近史密森学会却公布了20万张野生动物影像，这些影像是用隐藏在全球各地森林、丛山和热带稀树草原的自动相机拍摄到的。
We were seized by a frenzy: we began to gallop across the continent, through the savannas and forests that had recovered the earth, burying cities and roads, obliterating all trace of what had been.
我们的心中充满了愤怒：我们在大地上疾速奔驰，穿过草原和森林- - -它们覆盖了原来的城市和马路，重新恢复了生机，所有曾经发生过的一切都被湮灭了痕迹。
The area is "home to some of the purest natural beauty in Latin America , with dense tropical rain forests, wide savannas, coral reefs bursting with aquatic life, and delightfully deserted beaches."
此地“蕴藏着拉美最纯粹的自然之美，有茂密的热带雨林，无垠的热带稀树草原，水生生物繁盛的珊瑚群，还有养在深闺无人知的纯美沙滩。”
The area is "home to some of the purest natural beauty in Latin America , with dense tropical rain forests, wide savannas, coral reefs bursting with aquatic life, and delightfully deserted beaches."
此地“蕴藏着拉美最纯粹的自然之美，有茂密的热带雨林，无垠的热带稀树草原，水生生物繁盛的珊瑚群，还有养在深闺无人知的纯美沙滩。”
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