The combination of heat and charge releases electrons, which accelerate through the tube and strike a positively charged electrode at the other end.
加热和充电的结合释放出电子, 电子通过真空管加速撞击到对面充满正电的电极上。
2
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 dew point.