英语听力：探索发现 科学新发现：我们的大气层-23

But the friction and heat wears away at the space rock, the hot air actually melts the metal surface, and often the collision with the atmosphere can have a shattering effect, splitting the meteorites along fissures. This is an actual meteorite, and

发表于:2018-12-03 / 阅读(39) / 评论(0) 分类 探索与发现2014年

英语听力：探索发现 科学新发现：我们的大气层-25

One day these manned space missions may reach out even further to distant planets with alien atmospheres, atmospheres that may support their own life forms. Else where in our universe on distant planets, alien air may support extraterrestrial life. J

发表于:2018-12-03 / 阅读(34) / 评论(0) 分类 探索与发现2014年

英语听力：探索发现 科学新发现：我们的大气层-19

scores of sciencse experiments on board the airship study the dramatic persure change. we call it punset for pingpang ball satelite, and it also be the first thing we do is to have cut the pingbang ball on air ,then your experiment goes inside. and s

发表于:2018-12-03 / 阅读(35) / 评论(0) 分类 探索与发现2014年

英语听力：探索发现 科学新发现：我们的大气层-20

As the balloons rise higer still,they face an attact by an invisible bombardment,radiation.Every day the Sun radiates a titanic amount of energy,some of them in the form of high energy of ultra violet rays.These rays packed a powerful punch ,and in t

发表于:2018-12-03 / 阅读(32) / 评论(0) 分类 探索与发现2014年

英语听力：探索发现 科学新发现：我们的大气层-22

Steven Jabs search for remaining fragments, using a custom-built metal detector rig. Meteorites will have iron in them, and it's ? So not only will magneticbe attract to it, but also metal detector will be able to pick it up. Every year, over eightee

发表于:2018-12-03 / 阅读(34) / 评论(0) 分类 探索与发现2014年

英语听力：探索发现 科学新发现：我们的大气层-26

bubbles in the atmosphere.On other planets with denser atmospheres,larger, more complex creatures can take to skies.The thick air could support them alofty,allowing bulky reptiles to fly and glide.This creature probably couldn't be able to fly very l

发表于:2018-12-03 / 阅读(48) / 评论(0) 分类 探索与发现2014年

英语听力：探索发现 科学新发现：我们的大气层-24

This is a genuine iron meteorite, this is believed to have once been part of the core of a long dead planet or asteroid, and this was found right here in this strewn field, this remarkable little shapes, indentations on the surface are called thumbpr

发表于:2018-12-03 / 阅读(42) / 评论(0) 分类 探索与发现2014年
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