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Day1

01:Essentially,a theroy is an abstract,symbolic representation of what is conceived to be reality.

1.essentially: adj.本质上；基本上

2.symbolic:adj.象征的；符号的

3.representation:n.代表；表现

4.conceive:v.设想；构想

02:Thanks to modern irrigation,crops now grow abundantly in areas where once nothing but cacti and sagebrush could live.

1.irrigation:n.灌溉

2.cacti:[pl]n.仙人掌

3.sagebrush:n.灌木蒿；灌木蒿从

03:Anthropologists have discovered that fear,happiness,sadness,and surprise are universally reflected in facial expressions.

1.anthropologist:n.人类学家

04:Of the millions who saw Halley's Comet in 1986,how many people will live iong enough to see it return in the 21st century.

1.comet:n.彗星

05:The greater the population there is in a locality,the greater the need there is for water,trasportation,and disposal of refuse.

1.disposal:n.废物；垃圾