1·Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna.
草场的增加和随之而来的过度放牧导致了稀树草原的扩张。
2·In many characteristics, savanna soils are similar to those of some rain forests, though more extreme.
稀树草原的土壤与一些热带雨林的土壤有许多相似的特征，尽管会更极端。
3·On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland.
在某些地方，特别是在南美洲，稀树草原的形成似乎与频繁地砍伐和焚烧潮湿的森林作为牧场有关。
4·More than half of the world's savanna area is in Africa, but South America, Asia, and Australia also have these habitats.
全世界过半的稀树草原都在非洲，但在南美，亚洲，澳洲也有分布。
5·The author then proposes to develop an index of heterogeneity in time, perhaps in the following manner: Habitat, applying the numbers-1 of forest, o for meadow or savanna.
然后作者又提出求异质性在时间上的指数，这多半采用以下方法：生境：森林为—1，草甸或稀树草原为O。
1·The herders shifted south, following the major river systems into savanna regions.
牧民们向南迁移，沿着主要河流系统进入热带草原地区。
2·Rapid expansion of soybean plantations in South America could displace 22 million hectares (54 million acres) of tropical forest and savanna in the next 20 years.
在南美洲，大豆种植面积迅速扩大，这可能会导致未来20年热带森林和热带草原面积减少2200万公顷(5400万英亩)。
3·The larger savanna elephant (Loxodonta africana africana) and the smaller forest elephant (Loxodonta africana cyclotis) are capable of interbreeding.
体型较大的热带草原象(Loxodonta a fricana a fricana)和较小的丛林象(Loxodonta a fricana cyclotis)之间是可以发生杂交的。
4·Niger river in domestic long approximately 550 kilometers, it is one of the world hottest nations, North are subordinate tropics desert climate, south are subordinate savanna climate.
尼日尔河在境内长约550公里，它是世界上最热的国家之一，北部属热带沙漠气候，南部属热带草原气候。
5·My name is Dopal. I'm eleven years old and I live in 1 Tanzania, in the heart of the African 2 savanna.
我叫多培尔，十一岁了，住在坦桑尼亚热带草原的中心。
1·Though plenty of rain may fall on savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses.
尽管一年中大草原上可能会有大量降雨，但至少有一段时间是降雨很少的，造成干旱压力，最终有利于牧草生长。
2·Herds of giraffes gracefully move across the savanna in long, slow strides.
成群的长颈鹿舒缓地迈着大步，优雅地行走在大草原上。
3·Then, when moister times returned, the lakes filled and parts of the Sahara were transformed to savanna.
然而，当潮湿时期重新到来时，湖水充盈，撒哈拉大部分变成了大草原。
4·The savanna browsing black rhino has a prehensile lip for feeding on shrubs.
热带大草原的啮草黑犀牛有能卷握东西的嘴唇，可以用于吸食灌木的嫩枝叶。