Writer and journalist Mark Danner is not saying - how the 2007 International Committee of the Red Cross document,meant only for high-ranking Bush administration officials, came into his possession.

VOA: standard.2009.03.23

They performed-- not only the teacher; the teacher did perform better-- but the students actually performed better when they had high expectations, when they believed in their teachers.

学生们表现得…与老师无关;,老师没有更好的表现-,但学生表现得更好了,当他们有更高的期望时，当他们相信自己的老师时。

哈佛公开课 - 幸福课课程节选

The challenger contends that ballots marked for Mr.Karzai are arriving from districts where voting did not occur and turnout is being reported as high as 40 percent in areas where only 10 percent of voters cast ballots.

VOA: standard.2009.08.23

"Vitamin D has become a very hot topic in medicine now as we are discovering very high levels of vitamin D deficiency in our population, not only in the U.S.,but worldwide" Vitamin D helps our bodies absorb calcium and helps form and maintain strong bones.

VOA: standard.2010.05.28