英语中的6.5个亿怎么写答:6,500,000 six point five million 6百50万 65,000,000 sixty five million 6千5百万 650,000,000 six hundred and fifty million 6亿5千万 6,500,000,000 six point five billion 65亿 65,000,000,000 sixty five billion 6百50亿 650,000,000,000 six hundred and fifty billion 6千5...