Dinosaurs
美音、自然拼读、分级阅读与词汇复习
Finding Fossils How do we know dinosaurs lived on Earth?
寻找化石 我们怎么知道恐龙生活在地球上?
We know because we have found fossils in rocks all over the world.
我们知道,因为我们在全世界的岩石中发现了化石。
Scientists have found fossils of dinosaur bones, footprints, teeth, nests, and eggs.
科学家发现了恐龙骨,脚印,牙齿,巢穴和蛋等化石.
These scientists are carefully digging dinosaur fossils out of the ground.
这些科学家正在从地上仔细地挖掘出恐龙化石.
They will wrap up the fossils to keep them safe.
他们会把化石包起来 保证它们的安全
Then they will take them to a museum.
然后他们会带他们去博物馆
At the museum, scientists will study the fossils.
在博物馆,科学家将研究化石.
They try to fit bone fossils together to make a skeleton.
他们试图把骨头化石合在一起 做个骨架
Some pieces of the skeleton might be missing.
一些骨架可能不见了
Scientists use what they know about other animals to make pieces fit.
科学家们利用自己对其它动物的了解来制作相配的碎片.
Learning from Fossils Scientists study other animals to learn about dinosaurs.
从化石科学家那里学习其他动物来学习恐龙.
Dinosaur bones may be bigger.
恐龙骨可能较大.
But many are shaped the same.
但许多都一样
Scientists compare dinosaur bone fossils to other animals.
科学家将恐龙骨化石与其他动物作比较.
They learn that some dinosaurs walked, and some flew.
他们知道有些恐龙走过,有些飞了。
Scientists study fossil footprints to see how fast dinosaurs moved.
科学家研究出化石足迹,以观察恐龙移动多快.
Some dinosaurs moved very slowly.
一些恐龙移动非常缓慢.
Some moved faster than humans.
有些人移动的速度比人类快.
Scientists study fossil teeth to learn what dinosaurs ate.
科学家研究化石牙齿,以了解恐龙吃什么.
Some teeth are sharp like the teeth of meat eaters.
有的牙齿锋利如吃肉者的牙齿.
Other teeth are flat like the teeth of plant eaters.
其他的牙齿也和植物食用者的牙齿一样平平.
Scientists learn about dinosaur babies from fossil nests and eggs.
科学家们从化石巢和卵上了解了恐龙宝宝.
Some dinosaurs may have sat on their eggs like many birds do.
有些恐龙可能像许多鸟一样坐在蛋上.
Scientists also find fossils of plants, fish, insects, and other animals.
科学家还发现了植物,鱼类,昆虫等动物的化石.
These fossils help them learn what Earth was like when dinosaurs lived here.
这些化石有助于他们了解恐龙住在这里时地球是什么样.
How Long Ago?
有多长的Ago?
Scientists study rocks where fossils are found.
科学家研究发现化石的岩石.
Older fossils are deeper in the ground than newer fossils.
更古老的化石在地上比更新的化石更深.
No one knows for sure why the dinosaurs disappeared millions of years ago.
没有人知道为什么恐龙在数百万年前就消失了