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例子：例子必出题。文章有论点-论据-论证，例子是论证，用来支持论点，所以简而言之，例子本身不重要，但前后论点极其重要。 例子开始的标志：for example，后面跟着大写、时间、年代，依然是举例内容。 例子含义的标志：show， tell， prove， demonstrate， find， clearly [Page72] In the United States， the need to protect plant and animal species has become a highly controversial and sharply political issue since the passage of the Endangered Species Act in 1973. The act， designed to protect species living areas， and policies that preserve land and forests compete with economic interests. In the 1990 s， for example， the woodcutters in the Western United States were challenged legally in their attempt to cut trees for timber in the Cascade Mountains. The challenge was mounted to protect the endangered spotted owl(猫头鹰)， whose remaining population occupies these forests and requires the intact， ancient forest for survival. The problematic situation set the interests of environmentalists against those of corporations and of individuals who stood to lose jobs. After months of debate and legal battles， the fate of the woodcutters-and the owls-was still undecided in mid-1992. 注：1. controversial的意思是受争议的，同 sharply political issue ，contro表示 反 | 
