H2O
noun[U]
uk/ˌeɪtʃ.tuːˈəʊ/us/ˌeɪtʃ.tuːˈoʊ/(alsoH2O)thechemicalsymbolforwater; used to refer to thesubstancewater:
水的分子式，水H2Omeansthat eachwatermoleculecontainsoneoxygenand twohydrogenatoms.H2O表示每个水分子含有一个氧原子和两个氢原子。
Themapshowswhere you can get some H2O when you're outrunning.这张地图显示你出去跑步时在哪里可以得到水。
The morescientistsexamineH2O, thestrangeritstartstoseem.科学家们对水研究得越多，它就显得越奇怪。
- Water is the onlysubstanceonEarthwhosechemicalformulahasenteredthevernacular. We allknowH2O,evenif we don’tunderstandpreciselywhat itmeans.
- Twoscientistswalkinto abar. One says, "I'll have some H2O."
Chemicals, chemical compounds & gases
- acetic acid
- acetone
- acrolein
- acrylamide
- adenine
- aldehyde
- alkaline earth metal
- benzene
- benzoic acid
- Calor gas
- fluorocarbon
- HCFC
- HFC
- hyaluronic acid
- hydrochloric acid
- hydrochlorofluorocarbon
- hydrofluorocarbon
- metho
- tartaric acid
- tear gas