Hi, everybody. This Labor Day weekend, as we gather with family and friends, we'll also come together as a nation to honor some of our own-the working men and women of America who, across the generati
We need not just campaigning physicists, but we need biologists, computer experts and environmentalists as well. 我们不仅需要参加竞选的物理学家，还需要有生物学家，计算机专家和环境保护者们共同参与。 And I think academics and independent entrep
We seek neither their military alliance nor any artificial imitation of our society. 我们既不谋求使他们在军事上与我们结盟，也不希望他们人为地模仿我们的社会。 And they can know the warmth of the welcome that awaits them when, as must be,
Hi, everybody. This week, we made it official—I'm going to Cuba. 大家好。这个星期，我们正式决定，我即将出访古巴。 When Michelle and I go to Havana next month, it will be the first visit of a U.S. president to Cuba in nea
