请使用标准的变数宣告语法来宣告参考。

Use the standard variable declaration syntax to declare a reference.

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印刷标准编写者用TVI曲线来补偿这种变数。在早期的版本中，他们甚至将PDF标准化以及CMYK优化整合在整个印刷标准化流程中。

Print Standardizer is using TVI method to compensate the variation, in their early version, they even integrate their PDF Standardizer and CMYK Optimizer in the Print Standardizer workflow.

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以磁共振血管成像为标准，比较经颅多普勒超声发现相应血管病变数，得出诊断异常血管的特异性为94.22%、敏感性为78.10%、假阳性为7.46%，假阴性为23.31%及符合率为89.36%。

Considering MRA as the standard, the sensibility of diagnosing abnormal vessels by TCD was 78.10%, specificity 94.22%, false positive 7.46%, false negative 23.31%, and the coincidence rate 89.36%.

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