I'm here today to tell you that we are on the verge of another huge change, 我今天想要告诉各位，我们即将经历另一次剧变， and that this change, surprisingly enough, is going to come from manufacturing, again. 这次改变，出乎意料的是，也再
So this one is a quadcopter. 这是一个四轴飞行器。 It's a small model helicopter. In a way, it's a toy, no? 一个小型的直升机模型。差不多是个玩具吧。 And so this one was military technology a few years ago, and now it's open-source,
September 20, 2007 THE PRESIDENT: Good morning. In just 10 days the State Children's Health Insurance Program, known as S-CHIP, is set to expire. This important program helps children whose families c
Now, hip-hop song references are a really good tool for teaching content to students from hip-hop culture or urban communities. 对于教导嘻哈文化背景下，或城市社区背景下的学生，嘻哈的确是个绝佳的工具。 And I use it intentionally to conne
