The temperature records also differ slightly because the point of reference that each group uses to calculate global temperature is different.

温度的记录间的细微差别的原因还有一点是不同研究所运用的测量温度的参考不一样。

youdao

To make accurate temperature measurements with thermocouples, the reference junction temperature must remain constant. If it varies, suitable compensation for these variations must be provided.

要用热电偶实现精确的温度测量，参考端温度必须保持恒定；如果会变化，必须提供这些变化的适当补偿。

youdao

Voltage Reference in the design, how to achieve high-precision, low temperature coefficient is a major difficulty.

在基准电压源的设计中，如何实现高精度、低温度系数是一大难点。

youdao

So, you need some reference points to be able to tell you, OK, this temperature is 550 degrees Smith, whatever.

你需要定要一些参考点,它们告诉你，“这个温度是550史密斯氏度“之类。

麻省理工公开课 - 热力学与动力学课程节选

So, you assign values to very specific states of matter and call those the reference points for your temperature. For instance, freezing of water or boiling of water, the standard ones.

那么你对物质的,某些特殊状态指定数值,把它们叫做你的温度的参考点,比如水的冰点或沸点,它们都是标准。

麻省理工公开课 - 热力学与动力学课程节选