人体通过晒太阳来合成维生素D，可是皮肤科医生理查德·威勒指出，阳光还可以带来另一个惊人的益处。他的团队通过新研究表明：一氧化氮这种大量储存在皮肤中的化学传递质，能通过紫外线照射而释放出来，对血压和心血管系统产生很大益处。这是什么意思呢？那好，就从解释为什么苏格兰人比澳大利亚人更容易生病开始吧……演讲视频（无字幕）：Richard W
When i was seven, i started learning english. i played games and sang english songs with other children. sometimes, i watched english cartoons. it's funny. then i discovered the beauty of the langua
President Bush will welcome Salva Kiir, First Vice President of the Government of National Unity of Sudan and President of the Government of Southern Sudan, to the White House on January 5, 2009. The
And I stumbled, then, on a statistic that really came home to me. 结果我发现了一个震惊的数据。 It was a very interesting academic article in which I found that 67 percent of singles in America today who are living
