It was originally suggested that the fin was used for thermoregulation — self-regulationof body temperature — even when outside temperatures may vary drastically.
一开始，人们猜想这一背鳍是用来进行体温调节的。借助它，动物可以克服外界剧烈的温变而保持体温稳定。
2
Significant factors include regulationof line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamps.
主要的因素包括：线路电压的调节、设备房间室温、控制的温度、条件以及灯的寿命。
3
The two chief function of any air-conditioning system are the regulationof air temperature and humidity.