And the bubble line. Sometimes, instead of having a nice separation between the bubble and the dewline, there's a special point which for some reason those two curves meet. Non-ideality.
这是汽化线，有时汽化和液化曲线没有完全分开，因为某些原因，这两条线会在某个点相交，非理想情况。
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The NWS Web site features a handy on-line calculator for determining the heat index based on a combination of either temperature and relative humidity or temperature and dewpoint.
The sensor is composed of pyroelectric refrigerator and semiconductor detector, and controlled by a operator without model, In this way the air dew-point can be measured on line.