The yellow crazy ant is one of the world's most destructive invasive species (species that are not native to an area but rather introduced to it).It has spread to many regions of Earth and caused great damage to native ecosystems.In recent decades, the crazy ant has invaded part of a unique palm forest on one of the Seychelles Islands off the coast of Africa.Some strategies are being considered to stop the ant from spreading farther and damaging the unique ecosystem of the palm forest.
One of the strategies proposed to stop the ants is to use traps containing a low concentration of chemicals that are toxic to the ants.These ant traps have been successfully used in other locations,such as an island near Australia,where up to 99 percent of the invasive ant population has been killed by traps.。。。。余下托福TPO73综合写作阅读原文省略！
Now, listen to part of a lecture on the topic you just read about.
Unfortunately, the suggestions you read about are unlikely to work in this case. First of all, using toxic and traps would cause some unintended harm. You see, these traps do not differentiate between the yellow, crazy ants and other native species of ants. That means that the native ants can be harmed by the traps the island near Australia you read about does not have any native ants. So no unintended harm was done there. But in the palm forest on the Seychelles islands, there are native ant species present that we want to protect. And these ants would certainly be killed by the toxic traps. 。。。。余下托福TPO73综合写作听力原文省略！
The reading passage proposes three methods to prevent the damage to the palm forest caused by crazy ants.However, it is opposed by the listening material whose main idea is that none of the solutions would be likely to work well in the case of crazy ants.
Firstly,contrary to the belief in the reading passage that the problem can be solved by using toxic ant traps,the professor asserts that this method will cause some unintended harm.According to the professor,this method can not differentiate between crazy ants and native ands.On the Australian island mentioned in the reading,there is no native ant,so there is no unintentional harm,but in the palm forest on the Seychelles islands,there are native ant species which would be killed by the toxic traps.。。。。余下托福TPO73综合写作范文省略！