新概念英语第三册 Lesson 43(4)
3.背熟：it was almost impossible to attach hawsers and chains to the rim without damaging it.短语：attach to 把......连在......上；附加，使属于
attach == tie 栓，系
短语：rim ==the sides of the dish
结构分析:双重否定：not + without
4. Eventually chains were fixed to one end of the disk and a powerful winch was put into operation.
短语：Eventually == at last 语气比at last 强烈得多，
终于：强调失败的结果用in the end表示成功用at last, eventually
eventually 重点强调经过努力而终于......
finally 只表示顺序的最后
短语：put into operation =use
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