2号的听力是一边听，一边回复QQ上的朋友聊天听出来的，注意力没有特别集中，有些单词应该听出来的，都没有写出来。这个下次一定要改，QQ得隐身，专注练听力。

总结出来的生词居然有三张WORD文档，其实一直知道自己的词汇量很缺乏，这次一定要把词汇量提高上去，特别是常见的词汇。

词汇：

drastic

drastic

climate

occurrence

Sahara

Desert

撒哈拉沙漠

tropical

century

basically

granary

particularly

indicate

historic

pre-historic 史前的

hippo

hence

principal

evidence

Beneath

aquifer

perhaps

filter

fossilize

pollen

shrub

vegetate

elephant

giraffe

affect

variation

planet

practically

literature

migration

monsoon

seasonal

rainfall

migrate

dynamic

motion

tilting

angle

slight

perimeter

gradual

pretty

abrupt

shift

compound

a sort of

decrease

vegetation

retain

moisture

evaporate

formation

cycle

connection

ancient

Egypt

desert

flourish

Nile River

尼罗河

Nile



尼罗河

Valley

logical

hypothesize

temporary

drought

impetus