这个城市有一千兆人口。

This city has a population of one thousand million.

这个项目的预算是五兆元。

The budget for this project is five million dollars.

这家公司每年赚取数兆美元。

This company earns several million dollars each year.

他们计划在未来几年内投资十兆元。

They plan to invest ten million dollars in the coming years.

兆北率（百万分之几）

Part per million (abbr. ppm)

兆：一百万的词冠。

Mega: Million. Abbreviated M.

相信我，一个一亿兆吨当量的爆炸会产生非常多的热量和大量的压力。

And trust me, a 100 million megaton explosion cause a heck of a lot of heat and a huge amount of pressure.

根据美国小企业局的数据，截止到2007年，女性拥有780万家企业，创造1.2兆美元的收益，为760万名工人提供2180亿美元的工资。

By 2007, women owned 7.8 million businesses, according to the U.S. Small Business Administration. These generated $1.2 trillion in revenues, and provided $218 billion in payroll to 7.6 million workers.

这个视频大约有50兆字节大小。

This video is about 50 meg in size.

该电台在100兆赫兹频率上广播。

The radio station broadcasts on 100 MHz.