cold and heat; cooling and heating
Refers to the pair of cold and heat as physical phenomena, or to cooling and heating functions. Often used in technical contexts such as air conditioning or thermal management.
This device can control both cooling and heating.
indifference and enthusiasm; prosperity and decline
Figurative use contrasting extremes of human emotion or fortune. Rare and somewhat literary; more common in set phrases or classical contexts.
cold energy; cold source
Technical term for cold as an energy source, e.g., in power generation using temperature differences. Often appears in compounds like 冷熱発電.
See also: 冷熱発電
Advances in cooling and heating technology have led to energy savings.
I have experienced the ups and downs of life.
His attitude swings wildly between coldness and enthusiasm.
Cold energy power generation is a technology that uses temperature differences to produce electricity.
cold energy power generation
Compound of 冷 (cold) and 熱 (heat). The figurative senses likely developed from the contrast between the two extremes.