Hi, everybody. 大家好！ Over the past 52 months, our businesses have created nearly 10 million new jobs. 过去的52个月里，我们的企业一共创造了1000万个就业岗位。 The unemployment rate has fallen to its lowest point since 2008. 失业率

DNA is the fundamental molecule the carries genetic instructions that help build the living world. DNA是携带遗传指令最基本的分子，帮助建造了生机勃勃的世界。 Humans have DNA. Pigs have DNA. Even bacteria and some viruses have DN

November 26, 2007 PRESIDENT BUSH: Madam Secretary, thank you for your hospitality. I was wondering where my place is. (Laughter.) I appreciate very much your hosting this important dinner. Prime Minis

2009年9月8日，奥巴马总统在弗吉尼亚州阿灵顿郡（Arlington, Virginia）韦克菲尔德高中（Wakefield High School）对全美中小学生发表讲话，强调上学读书的重要性，激励学生努力学习。以下是讲话全文： REMARKS BY THE PRESIDENT IN A NATIONAL ADDRESS TO AMERICA’S SCHOOLCHILDREN Wakefiel

March 10, 2008 MRS. BUSH: Welcome, everyone, to the White House, for this celebration of Women's History Month and International Women's Day. A special welcome to the women members of Congress who are