Since nitrogen is four fifths of the air we breathe, they are surprisingly optimistic about raising the temperature on Mars and believe it could be done in hundred years.

由于氮占我们呼吸的空气的五分之四，他们对提高火星的温度持惊人的乐观态度，相信这可以在一百年内完成。

youdao

Age estimates ranging from four billion years for Mars's southern highlands to a few hundred million years in the youngest volcanic areas were obtained in this way.

通过这种方法，科学家们获得了火星南部高地40亿年到最年轻的火山地区（几亿年）的年龄估计数。

youdao

I began a second drawer for more general discoveries: new cave system discovered with dozens of nameless species, four hundred species of bacteria found in the human stomach.

我打开了第二个抽屉里，寻找更普遍的发现：在新的洞穴系统里发现了几十种不知名的物种，在人的胃里发现了400种细菌。

youdao

In eighteen fifty,there were an estimated one hundred fifty glaciers in the more than four hundred thousand hectare park.

VOA: special.2009.04.22

But De Gaulle,who we'll talk about later, De Gaulle said,how in the hell can you run a state in which there are four-hundred and forty different kinds of cheese?

但是戴高乐,我们之后会谈到他,他说,到底怎么样去管理一个,拥有四百四十多种不同奶酪的国家

耶鲁公开课 - 1871年后的法国课程节选

And so you can see here now you're not just getting relative risks of two, three, or four but you're getting relative risk of a hundred, in this case, massively elevated risk.

可以看出,肥胖人群的患病风险不只高出了三四倍,而是上百倍,风险极大地提高了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Figures from the council said Surrey had less than four in a hundred young people classified as Neet, compared with the national average of more than six in a hundred.

BBC: Surrey County Council targets firms in apprentice drive

Or to the designs of an ancient plot set in motion exactly four hundred years ago in the library of the King of Bohemia.

NPR: Excerpt: 'Borges and the Eternal Orangutans'

In the last thirty days before the election, Whitaker and Baxter advertised in four hundred newspapers and on five hundred billboards.

NEWYORKER: The Lie Factory