General rules one. two 千 thousand, two百万 a million, two+亿 a billion,two万亿 trillion n, twenty thousand million billion 百 hundred, two万 ten thousand千万 ten million,百亿 ten billion, (万亿以 trillion计) hundred twenty thousand twenty million twenty billion 十万 a hundred 亿 a hundred (一对应) thousand,two million, two hundred billion, two hundred hundred thousand.million billion (千、万和十万 (百万、千万 十亿、百亿 以 thousand计 和亿以 million计)和千亿以bin计)个 one, two… 十 ten, twenty… 百 hundred, two hundred… (一一对应) 千 thousand, two thousand 万 ten thousand, twenty thousand… 十万 a hundred thousand, two hundred thousand… (千、万和十万 以thousand计) 百万 a million, two million… 千万 ten million, twenty million… 亿 a hundred million, two hundred million… （百万、千万 和亿以million计） 十亿 a billion, two billion 百亿 ten billion, twenty billion 千亿 a hundred billion, two hundred billion (十亿、百亿 和千亿以billion计) 万亿 trillion （万亿以trillion计）