这是三相点温度，这是三相点气压。

The triple point temperature, triple point pressure.

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在三相点温度以上，超流和正常相之间有二级相变。

Above the critical point, the second-order phase-transition line between the superfluid and the normal phase is determined.

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给出了该温度计在液氮、液氢和液氦中反复锻炼后在水三相点温度时的阻值的稳定性。

A good stability of temperature resistance values at the three-phase point of water is obtained when the thermometers are tested in liquid nitrogen, liquid hydrogen and liquid helium repeatedly.

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So this unique temperature and unique pressure defines a triple point everywhere, and that's a great reference point.

这样，无论在何处,三相点都具有相同的温度和压强,十分适合来作参考点。

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And our other reference point is the triple point of water - reference points become zero Kelvin, absolute zero, and the triple point.

而使用绝对零度,它与压强无关,是最低的温度，另一个参考点是水的三相点。

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And the triple point of water is 16K that temperature and pressure - there's a unique temperature and pressure where water exists in equilibrium between the liquid phase, the vapor phase, and the solid phase.

与水的三相点,我们定义它为273。,水的三相点,是一个特定的温度和压强,可以使水的液态，气态和固态三相共同达到平衡，三相点是液态。

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