Most curious of all is AOL's acquisition of Bebo, an up-and-coming social network, earlier this month.

最让人难以理解的是本月早些时候美国在线收购了一家颇有前途的社会网络公司，Bebo。

2.unemployment rate 失业率
 

The nation's unemployment rate has been climbing steadily since last June.

去年6月以来这个国家的失业率在稳步持续上升。