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As a country constantly worried by its lack of water, water conservancy is extremely important.
若一个国家经常担心缺水,说明水利建设意义及其重大。
youdao
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As a country constantly worried by its lack of water, water conservancy is extremely important.
若一个国家经常担心缺水,说明水利建设意义及其重大。
youdao