来源：[本站编辑] 发布时间：2017-08-02 14:23:36 浏览125次
A large meteor hit the earth
一个巨大的彗星撞击地球
If a volcano erupts, the ash from this blocks out the sunlight【北京环宇九天培训学校】 and increases sulfur dioxide and carbon dioxide in the air
火山爆发后，灰尘阻挡阳光，从而增加空气中的硫磺和二氧化碳
Some dinosaurs were eaten by other species
一些恐龙被其它动物吃了
Global warming caused the ice caps to melt and there was a flood
全球变暖使得冰山融化，从而导致洪水
Reptiles lay eggs
爬行动物产卵
Small mammals eat eggs
小型哺乳动物吃卵
Pollution and radiation can cause infertility
污染和辐射使得土地退化
Sources of food became short
食物减少
Some people think dinosaurs were taken away by aliens to another planet
有些人认为恐龙被外星人带到其它星球去了
Dinosaurs evolved into birds
恐龙进化成鸟类
Over 200 million years ago, the continents were all joined together (called Pangaea)
两亿多年前，地球大陆板块都是连在一起的
Dinosaur fossils are found on all the continents of the earth
恐龙化石在世界各地都能找到
Reptiles are cold blooded and need warmth to
Survive
爬行动物是冷血动物，他们需要热量来存活
Dinosaurs died out relatively suddenly around 65 million years ago
恐龙大约在6前五百年前快速灭绝了
Mammals were becoming more successful
哺乳动物大量存活，繁衍
Parts of dinosaur DNA is still seen in birds today
恐龙的部分DNA 可以在今天的一些鸟类身上发现
Dinosaur DNA is found in mosquitoes trapped in amber
在有蚊子的琥珀里发现了恐龙的DNA
The elliptical orbit of the earth changes slightly over long periods of time, moving further away from the sun
离心力的作用是地球和太阳的距离更远了
When volcanoes erupt, the ash that is produced blocks out the light and heat from the sun. Dust and soil from a meteor collision has the same effect
火山灰可以阻挡阳光，彗星撞击地球也有一样的效果
Scientists can date some materials using carbon dating
科学家可用碳元素来推断一些物质的年代
Radiation can cause cancer
辐射可以致癌
Scientists can date some materials using carbon dating
Mosquitoes can carry the malaria parasite
蚊子带有疟疾病毒
When the continents moved apart, the part with the dinosaurs went to the north pole
地球大陆分裂时，一些在陆地上的恐龙被带到北极
Sulfur dioxide has been linked to male infertility
硫磺气体可导致雄性不能繁殖
250 million years ago 95% of life disappeared
两亿五千年前95%的生物灭绝了
Increased pollution makes egg shell thinner
污染使得蛋壳变得薄了
Temperature of egg incubation determines the success of, and ratio of male to female young dinosaurs
在恐龙孵化时，温度决定了存活率和性别
Large animals with high metabolic rates need lots of food
大型动物有着很强的代谢功能，所以需要很多食物
Increased levels of oxygen in the air cause the rate of metabolism in animals to increase
空气中氧气含量增加，动物的代谢功能也增加了
Plants started to evolve to produce flowers to aid reproduction
植物进化成了花，有了再造能力
Radiation can cause mental disorders as a result of changes to brain size
辐射可以早能大脑损伤，是大脑变小
Solar flares and sunspots can affect the climate and atmosphere
太阳耀斑和黑子可以影响气候和大气层
Increased ultra-violet radiation from solar flares can destroy the ozone layer
太阳黑子产生的辐射，可以破坏臭氧层
High levels of radiation can result in problems within egg embryos
高度辐射可以影响卵的胚胎
Lots of dinosaur bones have been found trapped in lava
火山岩浆中找到了恐龙的骨头
There were vast lava flows found from 250 million years ago in Siberia
在西伯利亚发现了约2亿5千万年前大量的岩浆流动
Rock samples from the Karoo basin in South Africa do not show signs of an meteor impact
在南非盆地找到的岩石，没有彗星撞击的迹象
A huge crater, 120 miles wide has been found in the gulf of Mexico and dates back 65 million years
在墨西哥湾发现了一个巨大的火山坑，大约在6千5百万年前形成的
Fossil evidence shows that most dinosaurs were extinct long before 65 million years ago
从化石来看，大部分恐龙在6千5百年前就灭绝了
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