As what geographers have estimated, about twenty percent of the earth's surface is occupied by deserts. A majority of us view deserts as one unique kind of landscape -- areas with little or no rainfalls.
In actual fact, there are differences between the deserts, though in varying degrees. While it is common for laymen like us to see deserts as rocky or covered with gravel or pebbles, there are some where large sand dunes inhabit. Despite the fact that rainfall is minimal, temperatures do change in deserts, ranging from seasonal ones to daily changes where extreme hotness and coldness are experienced in the day and night.
Unfavorable conditions in the deserts, especially the lack of water, have discouraged many living things from inhabiting these landscapes. Nevertheless, there are exceptionally surviving ones which through their superb tactics, have managed to live through and are still going strong. One such kind is the specialist annual plants which overcome seasonal temperature changes with their extremely short, active life cycles. In events of sudden rain, the plant seeds pullulate and grow very quickly to make full use of the rain water. Their flowers bloom and set seeds that ripen quickly in the hot sun too. Once the water runs dry, the mother plant dies, leaving behind the drought-resistant seeds, waiting patiently for the next rainy season to arrive.
The Cacti, a native in American deserts, adapts to the dry surroundings by having unique body structures. The plant has swollen stems to help store water that carries it through months. By having sharp pines instead of leaves, water loss through respiration is minimized. Besides, these pointed pines also help the plant ward off grazing animals, thus enhancing its survival period.
Besides plants, there are also animals with distinct surviving tactics in deserts too. For instance, Skinks ( desert lizards ) metabolize stored fats in their bulbous tails, producing water to supplement their needs, just like what camels do with the stored food in their humps during long journeys through deserts. Antelopes like the addax, have very low water needs and hence are able to tolerate the conditions in deserts, extracting moisture from the food they eat.
Finally, there are the sandgrouses ( desert birds ) which do not have special features to overcome the drought-like nature in deserts. Hence, to survive in these hot, dry deserts, they need to spend a large part of their time flying in search of waterholes.
对了 就是缩写这篇文章 求帮忙
要的是缩写这篇文章 如果你能帮我 缩写 我就采纳你的把
追答像地理学家估计,大约百分之二十的地球表面被沙漠。我们大多数人观点作为一种独特的沙漠景观——地区降雨很少或根本没有。
事实上,有差异,但在不同程度的沙漠。虽然是常见的外行人喜欢我们看到沙漠作为岩石或砾石和卵石覆盖,有一些在大沙丘居住。尽管事实上,降雨量少,温度做了改变。
就这样
呵呵 虽然楼下的 都有用在线翻译的 给我翻译了 但是我要的是缩写 我看那些人也没什么 水平 看你爽就给你这10分把 哈哈
本回答被提问者采纳求翻译这段英语片段 ...读完这个要我写作文,可是我连这段都读不懂
最后,还有sandgrouses,沙漠鸟的不具有特殊的功能,以克服干旱就像在沙漠中的性质。因此,在这炎热干燥的沙漠中生存,他们需要花费很大一部分的时间在寻找水潭飞。
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Today many people enjoy shopping online, and the advantage has its advantages and disadvantages. shopping online is very convenient, and 24 hours the business, selling items are also very special, no queuing is the invisible. the lack of goods, cannot enjoy friends and shopping fun....