over the last hundred years, hunting and forest destruction have reduced tiger populations from hundreds of thousands of animals to perhaps fewer than 2,500.
在最近的一百多年里,捕杀以及森林的破坏使得老虎的数量由几十万只骤减到不到2,500只。
forest destruction , water and air pollution result in decrease of planting land and unpleasant weather.
森林破坏,水和空气污染导致减少种植业土地及不愉快的天气。
is animal and forest destruction is not what we humans do?
难道动物和森林不是我们人类所破坏的吗?
by analysing historical records we identified the date of the ancient lake, the influence of forest destruction on environment and shrinkage or extinction of the lake.
最后,结合历史资料,分析、确定了古湖泊的时代、森林植被的破坏及湖泊收缩乃至灭亡对环境的影响。
besides, forest destruction , water and air pollution result in decrease of planting land and unpleasant weather.
此外,森林破坏,水和空气污染导致减少种植业土地及不愉快的天气。
over the last hundred years, hunting and forest destruction have reduced overall tiger populations from hundreds of thousands to perhaps 5,000 to 7,000.
过去的一百年中,猎杀和森林砍伐使老虎的数量由数十万锐减至大约
another reason for tropical forest destruction is the world's demand for timber.
热带森林遭毁灭的另一个原因就是世界对枕木的需求。
over the last hundred years, hunting and forest destruction have reduced overall tiger populations from hundreds of thousands to perhaps 5, 000 to 7, 000.
过去的一百年中,猎杀和森林砍伐使老虎的数量由数十万锐减至大约5000-7000头。