What makes the endeavor challenging, if not the size of the archive, is its composition: billions and billions and billions of tweets.

使这一努力具有挑战性的如果不是档案库的大小，就是它的构成成分——数十亿计的推讯。

youdao

A protein made up of just 100 amino acids could take on an endless number (billions upon billions) of shapes.

一个仅由100个氨基酸组成的蛋白质可以呈现无数(数十亿以上)个形状。

youdao

Rain forests like those in Madagascar contain billions and billions of tons of carbon; destroying the trees and releasing the carbon not only kills local species but also speeds global warming.

像马达加斯加这样的雨林蕴含数十亿顿碳；毁掉树林以及毁林过程中释放出的碳不仅会毁灭当地物种，还会加速全球变暖。

youdao

But never before has the government used hundreds of billions of dollars to rescue companies that made risky investments.

VOA: special.2009.10.30

So 2 billion, 4 billion -- these are big numbers, but there's a lot of "billions of things" in the world, right?

所以20亿，40亿--这都是很大的数值，但是世界上有很多“数十亿的东西“，对不？

哈佛公开课 - 计算机科学课程节选

And the company grew 80%per year for the first eight years compounded, and 60 % per year for the six years after that, which adds up to tens of billions real quick, as you know.

公司保持百分之八十的年增长,持续了八年，这之后的六年，每年增长百分之六十，正如你们所知，在很短的,一段时间内赚了数百亿。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

How then to turn tens of billions of public dollars into hundreds of billions in private finance?

ECONOMIST: Investors and climate change

Some of the proposals would cost tens of billions of dollars, hundreds of billions of dollars -- like the payroll tax cut.

WHITEHOUSE: Press Briefing

Tens of billions of dollars or hundreds of billions of dollars?

WHITEHOUSE: Press Briefing