Hi, everybody. Over the past four and a half years, we've been fighting our way back from an economic crisis and punishing recession that cost millions of Americans their jobs, their homes, and the se
And trust is established, not by some big institution, 信任的建立并不是基于一些大型机构， but by collaboration, by cryptography and by some clever code. 而是基于合作，基于密码技术和一些精巧的代码。 And because trust is native to the techno
Obama's Weekly Address WEEKLY ADDRESS: The First Lady Marks Mother’s Day and Speaks Out on the Tragic Kidnapping in Nigeria 奥巴马每周电视讲话:第一夫人表达母亲节祝福 Hello everyone, I'm Michelle Obama, and on this
Earlier this year, I got a letter from a South Carolina woman named Ashley, who was expecting her third child. 今年早些时候，我收到一封来自南卡罗来纳州阿什利女士的来信，她正期盼第三个孩子降临。 She was, in her words, "extremely concerne
