In the reading passage, the writer claims that growing genetically modified trees will bring a lot of benefits. However, the lecturer refutes the opinions in three aspects.
First of all, the lecturer asserts that the natural trees may
be survived survive in few amounts if suffer from climate changes and insects because of their genetic diversities. On the contrary, the genetically modified trees lack of genetic variety. Therefore, they might die away in some certain conditions.
Moreover, the lecturer argues that although cultivating genetically modified trees can bring economic benefits, it will cost much more than growing natural trees. For one thing, the farmers would pay more to buy the seeds of genetically modified trees. For another thing, it is cited in the laws that farmers should pay company money once they plant a genetically modified tree. As a result, considering the hinder costs,
they may not get more benefits than growing unmodified trees.这个好像不大准确啊Finally, the genetically modified trees may spread aggressively. They will compete with native trees for nutrient elements
in the like soil, sunlight, water and spaces. Consequently, genetically modifie
sd trees will
damage感觉不大准确 用outcompete native trees other than preventing them from destroy. This directly contradicts what the passage indicates.
damage[?dæm?d?]n1. injury or harm impairing the function or condition of a person or thing2. loss of something desirable3.Informal cost; expense (esp in the phrase what's the damage?)vb1.(tr) to cause damage to2.(intr) to suffer damage
To sum up, the contents narrated in the passage are totally jeopardized by the professor, and the professor has completely different points
-- by 会员 包子不包子 (2012/6/14 10:48:33)