Though the 21st century has come, the definition problem remains unsettled.
时至21世纪，定义问题依旧悬而未决。
In the research of primary spectrum pyrometry, this paper discussed the definition problem of radiation temperature measurement area based on the measurement coordinates.
文章讨论了谱色测温系统研究中，基于测温坐标系的辐射测温区域的界定问题。
In the research of primary spectrum pyrometry, this paper discussed the definition problem of radiation temperature measurement area based on the measurement coordinates.
文章讨论了谱色测温系统研究中，基于测温坐标系的辐射测温区域的界定问题。
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