youdao

These rocks have been dated radiometrically at two billion years old.

经辐射能探测，这些岩石形成于20亿年前。

《牛津词典》

Some two billion people are short of water.

约有20亿人缺少用水。

youdao

Sri Lanka has been seeking a two billion dollar loan from the International Monetary Fund to help its economy.

VOA: special.2009.05.16

Yale now has over twenty-two billion dollars in its endowment.

他缔造了年平均收益率16.1%辉煌绩效 耶鲁现在拥有超过220亿美元的基金

耶鲁公开课 - 金融市场课程节选

re not regulated tightly as ordinary banks would be I believe they have something, they have something like two billion dollar line of credit at the treasury.

他们所受管制，They’,没有普通银行严格,我想他们有，他们有大概20亿元,的授信额度,在财政部。

斯坦福公开课 - 经济学课程节选

Bacteria evolved the necessary chemistry to "fix" nitrogen from the air, about two billion years ago.

BBC: Leaving our mark: Fossils of the future

There are going to be over two billion people to feed across Africa in coming generations.

FORBES: Will African Farmland Yield the Elusive Alpha for Portfolios

Those two billion downloads are the capstone on a massive year for the App store.

FORBES: Apple's App Store Racks Up Two Billion Downloads in December Alone