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71. And educators are trying to get the message to parents that they should be on the alert for the first signs of potential problems. 【分析】本句为复合句。主句为educators are trying to get the message to parents。that引导同位语从句，具体说明message的内容。to parents分隔了中心词和同位语。 【译文】 而且教育家们正试图让家长明白他们应该警惕潜在问题的最初征兆。 72. Buoyed by laws and court decisions, more and more older Americans are declining the retirement dinner in favor of staying on the jobthereby lessening employment and promotion opportunities for younger workers. 【分析】本句为简单句。句子主干为more and more Americans are declining the retirement dinner。过去分词Buoyed作原因状语，它的逻辑主语是older Americans，old Americans与buoy所表达的关系是被动承受。现在分词短语lessening 作结果状语。 【译文】 在法律和法庭判决的支持下，越来越多的美国老年人正在拒绝退休而宁愿选择继续工作因此减少了年轻人的就业和升职机会。 73. Practically unheard of a generation ago, the discounts have become a routine part of many businessesas common as color televisions in model rooms and free coffee on airliners. | 
