A rainforest is an area covered by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below l6℃．Rainforests have a great effect on the world environment because they can take in heat from the sun and adjust the climate．Without the forest cover，these areas would reflect more heat into the atmosphere，warming the rest of the world. Losing the rainforests may also influence wind and rainfall patterns，potentially causing certain natural disasters all over the world．
In the past hundred years，humans have begun destroying rainforests in search of three major resources(资源)：land for crops，wood for paper and other products，land for raising farm animals．This action affects the environment as a whole．For example，a lot of carbon dioxide(二氧化碳)in the air comes from burning the rainforests．People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit.
There are two main reasons for this．Firstly，when people cut down trees，generally they can only use the land for a year or two．Secondly，cutting large sections of rainforests may provide a good supply of wood right now，but in the long run it actually reduces the world’s wood supply．
Rainforests are often called the world’s drug store．More than 25％ of the medicines we use today come from plants in rainforests．However，fewer than l％of rainforest plants have been examined for their medical value．It is extremely likely that our best chance to cure diseases lies somewhere in the world’s shrinking rainforests．

A rainforest is an area covered by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below l6℃．Rainforests have a great effect on the world environment because they can take in heat from the sun and adjust the climate．Without the forest cover，these areas would reflect more heat into the atmosphere，warming the rest of the world. Losing the rainforests may also influence wind and rainfall patterns，potentially causing certain natural disasters all over the world．
雨林是一个覆盖着高大树木的地区，总体上降雨量高，但全年平均降雨量大致相当，气温很少低于l6℃以下。雨林对世界环境影响很大，因为雨林能够吸收来自太阳的热量并具有调节气候的作用。如果没有这些森林植被，这些地区会将更多的热量折射到大气层，从而造成世界其他地区的气候变暖。失去雨林也可能影响风和降雨模式，并能潜在地导致世界各地的某些自然灾害。
In the past hundred years，humans have begun destroying rainforests in search of three major resources(资源)：land for crops，wood for paper and other products，land for raising farm animals．This action affects the environment as a whole．For example，a lot of carbon dioxide(二氧化碳)in the air comes from burning the rainforests．People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit.
在过去的数百年里，人类一直在破坏着雨林来寻找三大资源：用来种植农作物的耕地，用来造纸和制作其他产品的木材和用来饲养牲畜的土地。这种行为从总体上影响了环境。例如：空气中大量的二氧化碳来自于雨林的燃烧。人们显然对砍伐树木而得到的资源有需求但我们将受到的惩罚会远远大于我们（破坏雨林得到）的益处。
There are two main reasons for this．Firstly，when people cut down trees，generally they can only use the land for a year or two．Secondly，cutting large sections of rainforests may provide a good supply of wood right now，but in the long run it actually reduces the world’s wood supply．
得到这种结果的原因主要有二个，第一，当人们砍伐树木时，一般而言，他们只能使用土地一至二年。第二，对雨林的大片砍伐也许一时保证了充足的木材供应。但从长远来看，实际上降低了全球木材供应量。
Rainforests are often called the world’s drug store．More than 25％ of the medicines we use today come from plants in rainforests．However，fewer than l％of rainforest plants have been examined for their medical value．It is extremely likely that our best chance to cure diseases lies somewhere in the world’s shrinking rainforests．
雨林常被称为世界的药店。我们现在使用的25%以上的药物来自雨林中的植物。然而，经检查，雨林中仅有不到1%的植物具有药用价值。我们治愈疾病的最佳机会极有可能存在于世界日益萎缩的雨林中的某个地方。