E-book sales are up 146 percent over last year, while hardback sales increased 6 percent and paperbacks decreased 8 percent.
出自-2014年6月阅读原文
A study by researchers at the University of California, San Francisco (UCSF), Stanford University and Columbia University shows that even a modest decrease in daily salt intake (摄入) can lead to dramatic health benefits.
出自-2013年6月阅读原文
Rather, with incomes decreasing and insecure jobs, unhappy couples often couldn't afford to divorce.
出自-2012年6月阅读原文