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E.g.:
A: How old are you?
B: I'm seventeen years old.
A: How many books do you have?
B: There are 8 books on my desk.
A: How many people are there in your family?
B: There are four people in my family.
A: What's your height ? And What's your weight ?
B: I'm 170 centimeters and 60 kilograms .
A: How much is it?
B: It's 80 dollars.
A: What's your phone number ?
B: It's 13599726365.
在英语数字的表达中，大于1000的数字，从右往左数，每3位数加一个“，”。
读作：two billion three hundred and sixty-three million eight hundred and ninety-one thousand and two.
E.g.:
568 读作：five hundred and sixty-eight
2,007 读作： two thousand and seven
1,987 读作： one thousand nine hundred and eighty-seven
1,804 读作： one thousand eight hundred and four
2,013 读作： two thousand and thirteen
289,504 读作：two hundred and eighty-nine thousand five hundred and four
72,000,000 读作：seventy-two million
1,443,497,378 读作：one billion four hundred and forty-three million four hundred and ninety-seven thousand three hundred and seventy-eight