The two principal combustion products are water vapor and carbon dioxide.两种主要的燃烧产物是水蒸气和二氧化碳。The car windows were fogged with vapor.车窗上满是雾气。When nitric acid is poured on copper, a brown vapor gives off.将硝酸倒在铜上, 会散发出一种棕色的蒸...
Usenet is a collection of discussion groups, known as newsgroups, to which anybody can subscribe.全球新闻网络是由多个被称为新闻组的讨论组组成，任何人都可以注册加入。You are cross posting to more than two newsgroups.您在多于两个新闻组中发文章.The information below is ...