Mother trees colonize their kin with bigger mycorrhizal networks. 母树通过更大的菌根网络来覆盖住自己孩子们所在的区域。 They send them more carbon below ground. 在地下，它们给孩子们会送去更多的碳。 They even reduce their own root competition to
My fellow Americans, 我的美国同胞们： The American Family has always been the heart of our great nation. 家是国之心脏。 In homes across this country, families teach their children to work hard, to love each other, a
THE PRESIDENT: Good morning. Next week, I will travel to Europe to attend the G8 summit. At this meeting, the leaders of industrialized nations will discuss ways we can work together to advance trade,
US President Bush's radio address on Athens 2004 Listen to the story: THE PRESIDENT:Good morning. This past week, the Games of the 28th Olympiad began in Athens. Athletes from more than 200 nations ga
