The most frequently detected chemical compound is water (HOH) with oxygen (o) as one of its atoms.

最常检测到的化学化合物是(HOH)，氧(O)是它的一个原子。

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For most elements the symbol is simply the abbreviated form of the English name consisting of one or two letters, for example: oxygen = O?

对大多数元素而言，其元素符号是其英文名字的简单缩写形式，由一或二个字母组成，例如：氧=O???。

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O is for oxygen. The oxygen is the essential item which the survival cannot leave.

代表“氧气”。氧气是生存离不开的必需品。

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You start with O double minus, so that is oxygen plus two electrons.

你从氧二负离子，也就是氯元素带2个负电子。

麻省理工公开课 - 固态化学导论课程节选

We put the magnesium 2 plus here, and then we put the oxygen here, O 2 minus, and we know that this gives us our R zero, right?

我们把Mg2+放这，然后O2-放这，我们都知道这给我们的是R0，对么？

麻省理工公开课 - 固态化学导论课程节选

Well, if you look, sulfur is less than chlorine, which is less than oxygen.

会发现S的比Cl的要低，比O也低。

麻省理工公开课 - 固态化学导论课程节选

Now we have a story about a tyrannical tycoon, Mr. O'Hare, who opposes oxygen-producing trees because they compete with his bottled-air business.

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" The force behind the initial-eponymous Oxygen cable channel and O magazine and Web site dismissed the whole affair as "much ado about nothing.

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"At 28, 000 feet, you don't have an awful lot of useful consciousness without the support of oxygen or being in a pressurized aircraft, " said O'Brien, a former CNN correspondent.

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