symb. 氧气 (Oxygen, Dioxygen)
O2 is Gospel singer Tonéx's second major release. It was released under Zomba Records in 2002 and spawned two major hits, "God Has Not 4Got" and "Bout A Thang", which had a video for the single.
氧
A backpack sends O2 in to let astronauts breathe normally.
一个背包可以输送氧气，让宇航员正常呼吸。
A large tree might make around 100kg of O2 per year.
一棵大树每年可以产生大约100公斤的氧气。
It takes about 7 to 8 trees to make enough O2 for one person to breathe for a year.
大约需要7到8棵树产生足够一个人呼吸一年的氧气。
Michael Jackson's 50-night run at London's O2 arena was to have set a new course for the entertainer.
VOA : standard.2009.06.26
And what I want to point out that we just figured out for molecular orbital theory, is that o 2 is a biradical, because remember, the definition of a radical is when we have an unpaired electron.
我要指出的是,我们刚利用分子轨道理论，指导了O2是二价自由基，因为记住，自由基的定义是,有个未配对的电子。
化学原理课程节选 : 麻省理工公开课
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？
固态化学导论课程节选 : 麻省理工公开课
This resulted in the band reforming for the concert at London's O2 arena in December 2007.
He first performed at the festival in 2007, shortly before his 21-night residency at London's O2.
It will extend the O2 phone number and package far beyond just the mobile handset.
ENGADGET: O2's TU Go software spreads your phone number across multiple devices