9月8日 综合:TPO 18 题目链接:http://www.51pigai.com/tofel-essay/toefl-tpo18-integrated
多谢指点啦!独立稍后就来。
The lecturer, who discusses the potentialsolutions proposed by the paragraph to save Torreya—a type of evergreen treeonce very common in Florida—from dying out, completely rejects all the threesolutions. The first solution is unrealistic accordingto the lecturer. Due to either global warming or area drying out, the regionthat used to contain the micro-climate that suits Torreya's plantingrequirement has become too warm and dry to facilitate such micro-climate. As aresult, finding a suitable place at the same location is not practical. The second solution of assisted immigrationis described as unpredictable. The lecturer gives an example of human assistingimmigration of black locust—another endangered species. The action did saveblack locust but resulted in it spreading too much beyond expectation andthrilling survival of other extinct trees. In this sense, assisted immigrationis not an adviceable solution either. The third solution of preserving Torreya inresearch centers is considered inadequate by the lecturer. Because of limitedcapacity of research centers, the generic diversity, and thus the resistance topotential diseases is so weak that it cannot be a long term solution. To conclude, none of the solutions reallysolves the problem in long term, without introducing potential harm to other equallyprecious species.
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