And the computer models, no matter how many that you have and how many people that you use, 那些计算机虚拟建模，不管你做了多少，用了多少人 are never going to be able to arrive at the same conclusions. 结论永远不同 Four years ago
It was a BU graduate student Lu Lingzi who lost her life along with two other innocent people 一个名叫吕令子的波士顿大学研究生，还有另外两名无辜的受害者，不幸丧生了， on a beautiful April day in your sophomore year while simply watching
July 10, 2007 10:59 A.M. EDT THE PRESIDENT: It's great to be in Cleveland. I've come to Cleveland to highlight a couple of important issues. First, energy independence is an important part of our nati
Hi, everybody. One of the things that makes America so strong is our spirit of innovation, our drive to invent and harness new technologies to tackle our greatest challenges. It's how we won the r
