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- mixed hydrogen and nitrogen 氢氮混和气
- Water contains hydrogen and oxygen. 水含有氢和氧。
- Water is composed of hydrogen and oxygen. 水由氢和氧组成。
- apparatus for determination of oxygen hydrogen and nitrogen 氢氧氮测定装置
- Water is composed of the elements hydrogen and oxygen. 水是由氢元素和氧元素组成的。
- Water may be resolved into hydrogen and oxygen. 水可以分解为氢和氧。
- Hydrogen and oxygen combine/Hydrogen combines with oxygen to form water. 氢与氧化合成水。
- A molecule of water consists of two atoms of hydrogen and one atom of oxygen. 水分子含有两个氢原子和一个氧原子。
- What are the purposes of helium and nitrogen gas? 氦气与氮气在这套系统中有何作用?
- Water can be dissolved into hydrogen and oxygen. 水能分解成氢和氧。
- Both hydrogen and oxygen are elements. 氢和氧都是化学元素。
- a gas made of carbon monoxide and hydrogen and nitrogen; made by passing air over hot coke. 含一氧化碳、氢和氮的煤气,将空气通过热焦炭而制成。
- Water is a compound of hydrogen and oxygen. 水是氢和氧的化合物。
- Water can be broken down into hydrogen and oxygen. 水可以分解为氢和氧。
- If it were not for oxygen and nitrogen in the air, no man could live on the earth. 大气中如果没有氧和氮,人就无法生存于地球了。
- So there are hydrogen and oxygen atoms in sugar. 所以糖里含有氢原子和氧原子。
- Hydrogen and oxygen combine to form water. 氢和氧化合形成水。
- Enrichment of organic matter and nitrogen in eroded bedloads. 侵蚀泥沙、有机质和全氮富集规律研究。
- The hydrogen and the oxygen react. 氢和氧发生化学反应。
- Don't mix hydrogen with oxidising gases, because a violent explosion might occur. 不要装氢气和氧化性的气体混装,因为可能发生剧烈的爆炸。