宇宙浩瀚，心中唯有求知与探索的热情。啦啦啦完整版免费视频4

　　On November 25th, 1915, Einstein published his greatest work: general relativity. The theory transformed our understanding of nature's laws and the entire history of the cosmos, reaching back to the origin of time itself. Now, in celebration of the 100th anniversary of Einstein's achievement, NOVA tells the inside story of Einstein's masterpiece. The story begins with the intui... (展开全部)