两种主要的燃烧产物是水蒸气和二氧化碳。The two principal combustion products are water vapor and carbon dioxide.水蒸气是气态的水.Water vapor is water in the form of a gas.云是由大气中的水蒸气凝结成的.A cloud is a condensation of water vapour in the atmosphere....
Phil's tormentor snorted derisively.折磨菲尔的人嘲讽地哼了一声。She grinned derisively while I seethed with rage.我怒火中烧，她却嘲弄地咧着嘴笑。This answer came derisively from several places at the same instant.好几个人都不约而同地以讥讽的口吻作出回答....