gives off短语²⁰⁵¹⁵ 基本例句 na.放出；🌏流露；他所流露 The striking of a match shows how the mechanical friction of rubbing the match head is changed into heat energy which in turn starts a chemical reaction which gives off flame and more heat. 当火柴划燃时，火柴头摩擦产生的机械摩擦转变为热能进而产生化学反应而发出火焰和更多的热量。 blog.sina.com.cn