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Units 3—4 重点单词 【1】 strengthen vi. & vt. 加强，增强 The gale continued to strengthen throughout the night. 整个晚上狂风越刮越猛。 在一些词后＋en构成动词，如： quicken, weaken, soften, harden, sharpen, broaden, widen等。 在一些词前加en构成动词，如： enrich, enlarge, encourage, endanger, enable, ensure等。 用strength的适当形式填空 ①Aerobic exercise __________ the hearts. ②The bridge needs to be __________. ③His objections only __________ my resolve to open my own company. ①strengths ②strengthened ③strengthened 【2】 conclusion n. 结论；结束 Your information is inaccurate, and therefore your conclusion is wrong. 你的信息不准确，所以你的结论是错误的。 What conclusion did you come to? 你得出了什么结论？ bring sth. to an early conclusion 把事情早早地了结 bring…to conclusion 使……终结 draw a conclusion from 由……得出结论 reach/come to/arrive at a conclusion 得出结论 in conclusion 最后，在结束时 | 
