[, ]any substance like air that is neither a solid nor a liquid 气体◆CFC gases 含氯氟烃气体◆The pipeline could carry up to 700 billion cubic feet of gas a year. 这条管道一年能输送多达 7 000 亿立方英尺的气体。
[] a particular type of gas or mixture of gases used as fuel for heating, cooking, etc. 气体燃料；天然气；煤气◆a gas cooker/furnace 煤气灶／炉◆a gas-fired power station 燃气发电站