急问.$4.21 billion 用英语怎么读出来?

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急问.$4.21billion用英语怎么读出来?急问.$4.21billion用英语怎么读出来?急问.$4.21billion用英语怎么读出来?fourpointtwentyonebillionUSd

急问.$4.21 billion 用英语怎么读出来?
急问.$4.21 billion 用英语怎么读出来?

急问.$4.21 billion 用英语怎么读出来?
four point twenty one billion US dollars

应该是
four point two one billion US dollars
最合理 我刚刚看人家演讲比赛都是这么说的

four point two one billion US dollars

four point two one billion

four point two one billion dollars

four point two one billion dollars