托福写作-TPO21-综合写作

综合写作：

阅读

总：基因改进数目有很多优点

1、更有抵抗力

2、长得快

3、可以保护天然树木

听力

总：有problems和costs

1、基因更加uniform，如果遇到不能抵御的，会大片wipe out

2、根据law，每次种树都要给公司付钱，hidden costs 更大

3、生长更加aggressively，会消耗自然资源，让天然树木受害

范文

In the lecture, the professor claims that although they may be some benefit, planting genetic modified trees will bring potential problems and costs. She totally opposes the three statements made in the reading passage.

Firstly, the professor indicates that genetic modified trees may resistant, but this cannot guarantee their survival. She points out that in fact the unity of genes within genetic modified plant will increase their likelihood to wipe out when there is some threatening situation. The professor counters the claim made by the reading passage.

Secondly, the professor opposes the reading passage by pointing out there is hidden cost behind modification trees. Though genetic modification trees may provide more products or can save pesticide, their seeds are usually charged at a higher price. In addition, according to the law, a farmer has to pay for the seed each time they plant the trees. This will not bring any economic benefit mentioned in the reading passage.

Last but not least, the professor opposes the statement that genetic modification trees will prevent overexploit of wild trees. In fact, genetic modification trees tend to grow aggressively and can easily exhaust the resource of normal trees. This will bring disastrous result for the local vegetation.