一万亿用英语怎么说

一万亿可以用英文单词 "trillion" 来表示。这个词来自法语 "trillion"，意为"三万万"，英语中它的意思是十的12次方。

例句：

The national debt is over twenty trillion dollars. (全国债务超过二十万亿美元)
The estimated cost of the project is one trillion yen. (该项目估计成本为一万亿日元)
The company's market capitalization is now over a trillion dollars. (公司的市值现在已经超过一万亿美元)