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Ozone is a type of gas. Its molecules are made of three oxygen atoms stuck together, instead of the usual two. High up in the sky, a thin layer of ozone protects us from the sun's harmful rays — people call this "the ozone layer." Near the ground, ozone is actually a kind of pollution and can be bad for our lungs. People also say the air by the sea smells "of ozone," meaning fresh and salty — though what they smell is not really ozone at all.
臭氧（臭氧層 = ozone layer）
組成From a Greek word meaning "to smell" — ozone has a sharp smell, and that is how it got its name.
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
ozonenoun/ˈəʊzəʊn/
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chemistryinorganic-chemistrynatural-sciencesAn allotrope of oxygen (symbol O₃) having three atoms in the molecule instead of the usual two; it is a toxic gas, generated from oxygen by electrical discharge.
- Lightning flashed again, the thunder came a second later. It rained harder. The smell of ozone was strong. You could feel the charge in the air.
- Martin said that the National Park Service invested in “a state-of-the-art ozone nanobubbler filtration system” that is intended to keep algae out.
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informalFresh air, especially that breathed at the seaside and smelling of seaweed.
- A patent obtained in England, and specified far from clearly, for obtaining ozone by boiling seaweed,†† may be mentioned as a curiosity, and also the credulity with which ozone-baths, prepared in this manner, find a ready sale, in spite of, or perhaps rather on account of, their high price.
- To Ramsgate baths she sped, in quest / Of seaweed and ozone ; / For seaweed and ozone were best, / They said, to give her tone.
ozoneverb/ˈəʊzəʊn/
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To treat with ozone.
- Whenever it exists, as it usually does, even where the tide water freshens at the ebb, it seems to have a purifying tendency, probably by ozoning the superincumbent atmosphere.
- I worked nonstop to make the house safe. Periodically I ozoned the first-floor bathroom, but it still made us sick.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。