Thousands of trees are cut down.
成千上万的树被砍伐。
The barren trees are cut down by the old man.
那贫瘠的土地几乎不长庄稼。
The barren trees are cut down by the old man.
老人砍了那些不结果的树。
Many trees are cut down to build more factories.
许多树木被砍伐，建立更多的工厂。
Thousands of trees are cut down in the forest every year.
在森林中每年有数以千计的树被砍倒。
At present, many trees are cut down and used to make chopsticks.
目前很多树都被砍下用来做筷子。
When trees are cut down, there is nothing to hold the soil in place.
树木被砍伐了，山坡上就没有什么东西能够把土壤保持住了。
We know that if too many trees are cut down, forests will disappear.
我们都知道如果砍伐太多的树木，森林就会消失。
We know that if too many trees are cut down, forests will disappear.
假如没有节制的砍伐太多的林木，森林将会消失，这个我们都知道。
When trees are cut down, there is nothing to hold the soil in place on the hillside.
树木被砍伐了，山坡上就没有什么东西能够把土壤保持住了。
When trees are cut down and more roads are built, fewer and fewer trees are left to make oxygen.
树木被砍伐，道路越修越多，剩下来制造氧气的树木越来越少。
We know that if too many trees are cut down, forests will disappear and nothing will grow on the land.
我们知道，如果有太多的树木砍伐，森林将会消失，并没有将生长于土地。
Another problem is that good soil is gradually lost. When trees are cut down, there is nothing to hold the soil in place on the hillside.
另外一个问题就是沃土逐渐流失，树木被砍伐了，山坡上就没有什么东西能够把土壤保持住了。
The trees cut down are counted as income but no subtraction is made for using up the forests.
砍伐的树木被算作收入，但被耗尽的森林资源却没有计入损失。
Elephants are losing their homes because people cut down too many trees.
因为人们砍伐了太多的树木，大象正在失去自己的家园。
People cut down many trees, so animals are in great danger.
人们砍伐了很多树，所以动物处于极大的危险中。
Can you cut down those bigger trees? They are blocking the sun.
你能砍倒那些较大的树吗？它们挡住了太阳。
Trees are being cut down. Large areas of forests are being destroyed.
树木被砍伐、大片的森林被破坏、多种动物遭到猎杀。
In the left hand picture, people are fleeing from voracious sand dunes because they cut down all the trees.
左图中，人们被贪婪的沙丘追赶，因为他们砍伐了所有的树木。
Villagers are venturing deeper into the forest to cut down trees for cooking charcoal.
当地的村民们则冒险涉足森林深处，砍伐树木以采集煮饭用的木炭。
People are not a11owed to cut down trees when they are still small.
当树还小的时候，是不允许人们砍的。
Around the world, trees are often cut down to clear land for bigger farms or more homes for growing populations.
在世界各地，树木经常被砍伐，为更多农田或为日益增长的人口建造房屋提供土地。
Today, too many trees are still being cut down in the USA.
今天，在美国仍有大量的树木在不断地被砍伐。
People cut down many trees so elephants are losing their homes.
人们砍倒了许多树，因此，大象渐渐失去它们的家园。
People cut down many trees so elephants are losing their homes.
因为人们砍倒许多树木，所有大象们正在失去自己的家园。
People cut down many trees so elephants are losing their homes.
因为人们砍倒许多树木，所有大象们正在失去自己的家园。
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