- 氧和氢组成了水。
Water is made up of oxygen and hydrogen.
- 水是由氢和氧组成的。
Water consists of hydrogen and oxygen.
- 它是个描述由大气层里在增多二氧化碳全球变暖的词语。
It is a term used to describe the warming of the earth due to increasing amounts of carbon dioxide in the atmosphere.
- 一个水分子是由两个氢原子和一个氧原子组成的。
A water molecule has two hydrogen atoms and one oxygen atom.
- 二氧化碳是一种每次如煤、石油或天然气这样的燃料燃烧时都会产生的气
Carbon dioxide is a gas that is produced every time a fuel such as coal, oil, or natural gas is burned.
