16 年前
视频简介
In 2014, the International Space Station had to move three times to avoid lethal chunks of space debris and there is an increasing problem of satellites mysteriously breaking down. With first-hand accounts from astronauts and experts, Horizon reveals the scale of the problem of space junk. Our planet is surrounded by hundreds of millions of pieces of junk moving at 17,000 miles...。1945年，延安的孩子们面对着战火的洗礼，生离死别的考验，但他们仍然能够保持淳朴可爱的天性，有一种从寻常生活中捡拾点滴快乐的本领。在大人们尽力维护的一片童真天地里，孩子们在自由地感受，自在地成长。。
标签
灾难
