之一

tā shì wǒ péng you zhī yī

她是我朋友之一。

She is one of my friends.

zhè bù shǒu gǎo zhǐ shì tā men de zhēn cáng zhī yī

这部手稿只是他们的珍藏之一。

The manuscript is just one of the treasures in their possession.

zhè jǐn jǐn shì suǒ yǒu xiāng guān de wèn tí zhī yī

这仅仅是所有相关的问题之一。

This is just one of a whole complex of issues.