名词
中文翻译：问题
同义词：
['difficulty', 'difficulty', 'issue', 'trouble']
例句：
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1.The problem of overpopulation is amajor concern for many countries.
人口过剩问题是许多国家的主要担忧。
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2. The solution to theproblem requires careful consideration.
解决这个问题需要仔细考虑。
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3.The company faces several problems in its operations.
该公司在其运营中面临几个问题。