托福tpo小作文模板.docIn the lecture, the professor casts doubt on the view in the reading passage that several measures have been proposed to stop the spread of the cane toad in Australia, claiming that ways are unsuccessful and will cause unwanted environmental damage.
Firstly, it is argued by the author that building a national fence can be a way. On the contrary, the professor refutes this by saying that young toads or eggs can flow from one side to another side through water ways like streams and then establish new population wherever the fence are set.
Secondly, according to the passage, the toads could be captured and destroyed by volunteers. However, the professor in the listening strongly challenges this by saying that the untrained volunteers will put native frogs in danger, which exert an negative effect. It is not easy to tell apart from frogs and cane toads from an early age.
Lastly, with respect to the reading passage that cane toad populations can be controlled by developing a disease-causing virus. On the other hand, the professor mentions that it will lead to terrible consequences. The virus contact with the cane toads will devastate their population, even in other continents that virus get by transverse of other species, which cause a ecological damage because they are an important part from the native America.
2015-11-10
In the reading passage, the author states that the scie
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