云卷云舒
2004
18 年前
视频简介
在高原上,气压低、氧气稀薄、动植物稀少,即使在这样的地方也生存着蝴蝶的种群,它们被称作高原蝴蝶。它们生命力极强,以各自独特的本领适应了高原环境,然而,它们却没能逃过气候紊乱、过度放牧等带来的影响。其中,中国唯一的迁徙蝴蝶——金斑蝶,生物钟出现紊乱,而祁连山上的珍贵绢蝶也濒临灭绝。该片跟随蝴蝶专家的脚步,记录环境变化对金斑蝶和绢蝶造成的生命周期及生活习性的影响。。Massive machines require engineering extremes. The massive man-made satellite, commonly known as the International Space Station, hurtling around the Earth at 27,600 km an hour, has been a temporary home for humans for the last 20 years. The biggest land vehicle on earth, a bucket excavator titled Bagger 293, that can move 240,000 cubic meters of dirt each day. Innovation has a...。