分析了重量法制备氮中多元标准混合气体定值不确定度的来源，其定值的扩展不确定度小于3％。

The source of the certification uncertainty of multi-component calibration gases in nitrogen was analyzed. The uncertainty is less than 3%.

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标准化多元线性回归显示温度变化的直接贡献者主要是温室气体，气溶胶的直接贡献很有限。

Standardized multiple linear regression demonstrates greenhouse gases as the primary direct contributor for temperature change, and the direct contribution of aerosols was much less.

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标准化多元线性回归显示温度变化的直接贡献者主要是温室气体，气溶胶的直接贡献很有限。

Standardized multiple linear regression demonstrates greenhouse gases as the primary direct contributor for temperature change, and the direct contribution of aerosols was much less.

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