诚然，整体数据低估了问题。
True, the headline Numbers somewhat underestimate the problem.
整体数据掩盖了不同类型国家之间碳排放发展趋势上存在的较大差异。
The headline figure masked big differences between trends in different groups of countries.
我们可以通过验证用户输入的准确性和完整性，来增强整体数据质量。
We can improve overall data quality by validating user input for accuracy and completeness.
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