标准测试环境：正式指定的测试纸张环境；相对湿度50%，温度摄氏23度。

Standard testing conditions: Officially specified conditions under which paper is tested: 50%relative humidity and 23 degree Celsius.

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文物保护专家指出，以上研究和博物馆标准相比，相对湿度变化仍然严重。

The conservator will remark that the RH variation is still extreme, compared with the variation allowed by museum standards.

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