THE PRESIDENT: Good morning. This week I visited with troops at Charleston Air Force Base. These fine men and women are serving courageously to protect our country against dangerous enemies. The terro

It's hurting people, it's hurting companies, and it's hurting our health. 这影响了百姓的利益，也伤害了公司的利益，同时也在影响我们的身体健康。 Because when policies and infrastructure fail, 因为当政府政策和基础设施的建设都无法发挥作用的时候， this is what happ

And the trick here is to use a single, readable sentence that the audience can key into if they get a bit lost, 这里的窍门就是使用简单、易读的句子，让观众即使有点儿不明白也能够掌握要点， and then provide visuals which appeal to our other

Hi, everybody. This week, we made it official – I'm going to Cuba. When Michelle and I go to Havana next month, it will be the first visit of a U.S. president to Cuba in nearly 90 years. And it bu

But what if that estimate is just based on your own experience in a non-mastery framework, 但假如那些判断仅仅是基于你们“非掌握体系”的个人经验， your own experience with yourself or observing your peers, 是基于你们的自身经历或仅是对周围人的观察而已