这部纪录片讲述了唐纳德·特朗普家族历史的非凡故事，一个非凡的移民成功故事。从下一任美国总统的背景中我们能了解到什么?

Horizon looks at dark energy - the mysterious force that is unexpectedly causing the universes expansion to speed up. The effects of dark energy were discovered in 1998 but physicists still dont know what it is. Worse, i…

Horizon looks at dark energy - the mysterious force that is unexpectedly causing the universe's expansion to speed up. The effects of dark energy were discovered in 1998 but physicists still don't know what it is. Worse,…