So what I'm showing you here is what a system might look like to do just this. 我现在向你们展示的是一个具备这种功能的系统可能的样子。 This is called an air contactor. 它被称为空气接触器。 You can see it has to be really, really wide in o

Each year more than 100,000 high school graduates, with proved ability, do not enter college because they cannot afford it. And if we cannot educate today's youth, what will we do in 1970 when ele

President Bush Visits National Defense University's Distinguished Lecture Program, Discusses Global War on Terror THE PRESIDENT: Thank you, General, for your kind and short introduction. (Laughter.) I

The key is consent. Right now most people are thinking about sexting without really thinking about consent at all. 关键是同意。现在很多人在想着色情短信本身，而完全忽略了“他人的同意”。 Did you know that we currently criminalize teen s

At the time, what they thought 在那个时候，启蒙学者们认为 distinguished science was a radical idea about things unseen, known as empiricism. 科学的独特标志是一个关于不可见事物的激进看法，叫做经验主义 All knowledge derives from the senses. 认为所