Each side provides the winter home for millions of monarchs.
出自-2014年6月听力原文
million jobs lost in the last three months, there is urgent desire to boost the economy as quickly as possible
出自-2013年6月阅读原文
Stored underground in large salt caves in Louisiana, this stockpile is called the Strategic Petroleum Reserve, and currently contains over 600 million barrels of oil, roughly equivalent to one month's supply.
出自-2013年6月阅读原文