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1·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。

2·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。

3·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。

4·Double add double o1, double o2.

double add double o 1, double o2。

5·Arsenal's shirts are now sponsored by O2.

阿森纳现在的球衣赞助商是O2。

6·The catalyst then knits pairs of oxygens together to make O2.

一对氧原子在催化剂上结合使其成为氧气分子。

7·In the UK the iPhone is only available on the O2 network on a monthly contract.

在英国，iphone只有在O2运营商的店里出售，并且至少要签一个月的话费合同。

8·O2's only current Windows Phone 7 handset could be the best for the platform yet.

目前O2运营的Windows Phone 7系统手机可以成为最好的平台。

9·Unlike other incumbents, BT has no mobile arm, having spun off O2 to reduce its debts.

与其他现任者不同，英国电信没有移动分支，出售其O2来减轻债务。

10·However, O2 dismissed the report, saying that it had benefited from the 'iPhone effect'.

不过，O2公司并不认同这份报告，并表示他们已经从“iPhone效应”中获益。