2014年08月CNN新闻听力教程汇总和更新
2014年08月CNN新闻听力更新列表
- 2014-08-01CNN News:地球轨道现存4000个退役卫星，存在极大安全隐患
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Sputnik One lasted about a year before it reentered Earth`s atmosphere and burned up. The th... [查看全文]
Sputnik One lasted about a year before it reentered Earth`s atmosphere and burned up. The th... [查看全文]
