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...
The car narrowly missed a cyclist.汽车差点儿撞上一位骑自行车的人。The cyclist turned off the highway onto a side road.自行车下了公路岔上了小道.The headwind chapped the cyclist's lips.骑车人的双唇因顶风而皲裂了....
The only ventilation comes from tiny sliding windows.只能通过小推拉窗来通风。Some people think that ventilation is the same thing as air conditioning.有些人以为通风和空调是一回事.The office has recently been refurbished and the ventilation system...