【正文】
() 80% of the population in China are farmers. 中國百分之八十的人口是農(nóng)民 。Unit 1 The Changing World Topic 2 Which country has the largest population? one hundred and fifty yuan two thousand and eight Olympic Games millions of stars since(自從) 650 million years ago about one billion (1,000,000,000 ) years old two point two six () meters tall 1,000,000,000 one billion one point three four 100 one hundred 1,000 one thousand 1,000,000 one million 十億 點 five hundred and fortythree point seven 1562 one thousand, five hundred and sixtytwo 6 004 001 six million, four thousand and one 7 198 764 502 seven billion, one hundred and niyeight million, seven hundred and sixtyfour thou