Such jokes tend to reinforce racial stereotypes.这样的笑话容易渲染种族偏见。Jokes perpetuate various national stereotypes.笑话固化了对各民族的公式化看法.The most commonly used letterpress duplicate plates are stereotypes , electrotypes, plastic plat...
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。Mars has an insubstantial atmosphere, consisting almost entirely of carbon dioxide.火星的大气层极其稀薄，几乎全部由二氧化碳构成。Carbon dioxide is a ne...