雨点打在铁皮屋顶上发出的有节奏的嗒嗒声the steady drumming of the rain on the tin roof雨水会使铁皮屋顶生锈.The rain will rust the iron roof.原来,有个货摊卖起了铁皮平底锅.It appeared that one of the stalls had been selling tin saucepans....
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...