百万 million 千万 millions and millionsvery manyfor goodness' sake 如果百万千万要连在一起的话.例:基于网络的邮件服务有着数以百万千万计的用户.Web-based email services have hundreds of millions of use
100万 million 10亿 billion 万亿trillion.注意英语没有万这个两次,举例如4437000 four million and four hundred thirty seven thousand and seven thousand 或者4.437百万four point four three seven million,望采纳