So, these are all rates of heat coming in, rates of heat going out and rates of heat which are generated in here.
म्हणून, हे सर्व आत येणाऱ्या उष्णतेचे दर, बाहेर जाणाऱ्या उष्णतेचे दर आणि येथे निर्माण होणाऱ्या उष्णतेचा दर आहे.