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...
Air inside an alveolus gives oxygen to blood and receives carbon dioxide from blood.肺泡里的空气给血液供氧,同时接收血液里的二氧化碳.Through this incision, the abdominal cavity is distended with carbon dioxide gas...二氧化碳气体通过这个切口进入，造成腹腔肿胀。Methan...
A crown, decorated with jewels, separates the headdress from the hair band.冠, 饰以珠宝, 分开的头饰从头发带.She often wears a hair band on her head.她头上常常戴著一条发圈.It't be Annie's hair band. It has her name on it.它一定是安妮的发带, 上面的她...
But in some respects cave dwellers were far cleverer than us.但是在某些方面穴居人要比我们聪明得多。She's so obviously cleverer and prettier than I am.她明显要比我聪明、漂亮得多。By contrast, he was much cleverer.相比之下, 他要机灵得多....