PHRASAL VERB 释放,放出,发出(气体、热量、气味等) If something gives off or gives out a gas, heat, or a smell, it produces it and sends it out into the air. 释放,放出,发出(气体、热量、气味等) [Also VERB n PREPOSITION]
...natural gas, which gives off less carbon dioxide than coal. [VERBPREP. noun]
二氧化碳释放量低于煤炭的天然气
Substances such as ammonia give out heat when they dissolve. [VERBPREP. noun (not pronoun)]