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II．语言点：
1．Finding fossil man: 寻找化石人
an animal or plant that lived many thousands of years ago and that has been preserved, or the shape of one of these animals or plants that has been preserved in rock:
fossils of early reptiles
Living fossil: an ancient animal or plant that still exists and has not changed
Panda
Fossil fuel 矿物燃料
fuel such as coal or oil that is produced by the very gradual decaying of animals or plants over millions of years:
eg．Environmentalists would like to see fossil fuels replaced by renewable energy sources．
informal an insulting word for an old person
2．Preserve their history 保护，保存
to save something or someone from being harmed or destroyed
preservation (n)
We must encourage the planting of new trees and preserve our existing woodlands.
think these interesting old customs should be preserved.
我认为这些有趣的旧习俗应该保存下去。
We must preserve world peace.
我们必须保护世界和平。
3．recount it as sagas---legends handed down fro one generation of storytellers to another.
formal to tell someone a story or describe a series of events
recount how/what
Alan recounted how he and Joyce had met．
She recounted her adventures.
她讲了她的冒险经历。
4．hand down
hand something ↔ down
to give or leave something to people who will live after you
hand something ↔ down to
The ring was handed down to her from her grandmother.
stories handed down by word of mouth
5．migration
when large numbers of people go to live in another area or country, especially in order to find work
migrate v [intransitive + from/to]
6．anthropologist 人类学家 anthropology 人类学
the scientific study of people, their societies, cultures etc
—anthropologist noun [uncountable]
—anthropological adjective
7．Polynesian people 波利尼西亚人
Polynesia：the islands in the central and southern Pacific Ocean, including the Hawaiian islands, Tonga, Samoa, and the islands of French Polynesia
中南太平洋群岛，包括夏威夷群岛，汤加以及法属波利尼西亚
8．archaeologist 考古学家archeology [uncountable] 考古学
the study of ancient societies by examining what remains of their buildings, graves, tools etc
—archaeologist noun
—archaeological adjective:
An archaeological site 考古点
—archaeologically adverb
9．modern man
现代人：一万年以前中世纪时期的人，长相接近现在的人，也叫智人，使用石制工具捕鱼和打猎。
10．Flint 打火石
a type of smooth hard stone that makes a small flame when you hit it with steel
11．This is easier to shape 塑型
to make something have a particular shape, especially by pressing it
shape something into something
Shape the dough into small balls.
egg-shaped/V-shaped etc
an L-shaped living room
形式主动，还有被动意义的动词：this is easier to be shaped.
类似的动词有：
This book is selling quickly.
What’s showing at cinema this week?
12．have rotted away; decay 腐败，腐烂
Rot 和 decay 都是不及物动词，可以互换
to be destroyed by a gradual natural process, or to make something do this:
Candy will rot your teeth.
The trees were cut and left to rot.
rot away
All the woodwork was rotting away.
注意：decayed 可以做形容词，如：decayed teeth
但rotted/rotten 一般作表语放在系动词之后 the banana will go rotten.
13．without trace 无影无踪
disappear/vanish/sink without (a) trace (=disappear completely, without leaving any sign of what happened)
The plane vanished without a trace.
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