燃烧三要素:heat,fuel,oxygen 野火的特征: fire,smoke,spark,flame 野火的种类: ground firesurface fire,crown fire 消防装备: pulaski,clothing, gear pack, pellet, truck形容火势的词: gigantic,large, spread quickly, slow-moving, grow faston purpose 有目的地;故意地 pick up speed 加快速度 on one's own 独立地;主动地 out of control 失去控制 in addition 此外;另外 it 作形式宾语的用法，例如: This makes it hard for other plants tosurvive. “leave sth.+形容词”句型，例如: Never leave a campfireunattended. “so...that...”句型，例如: Some forests can get so crowded withyoung trees that not much sunlight reaches the forest floor. as wellas”表示并列，例如: it holds food and water for thefirefighter, as well as an emergency shelter and flares.