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在写作时,构建有效句子和段落同样重要。可以尝试用一些描述性词汇来丰富句子,使文章更加生动。例如,In ancient times, the Nile River helped the people of Egypt by providing water for drinking, irrigation, and transportation. (古代,尼罗河为埃及人民提供了饮用水、灌溉和运输的 ...