One-ninth of all water on Earth is hydrogen.

地球上所有水的九分之一是氢。

youdao

One study showed that friendships among ninth graders were far from stable.

一项研究表明，九年级学生之间的友谊并不稳定。

youdao

This dream came true for me one afternoon in the ninth grade.

九年级的一个下午，我实现了这个梦想。

youdao

Enrico Fermi was born in Rome,Italy, on September twenty-ninth,nineteen-oh-one.

VOA: special.2009.06.14

That's one-third to one-ninth the rate seen for similar patients at a big hospital.

FORBES: Magazine Article

In 1990, AARP membership dues were one-third of gross receipts, but by 2009, they had fallen to one-ninth.

FORBES: Move up http://i.forbesimg.com t Move down

It gets only one-ninth the government funding as prostate cancer, which kills the same number people but has a big network of prominent survivors.

FORBES: Underfunded Diseases