Word: 一 (yī) one; single; a (article); entire

一，二，三！

Yī, èr, sān!

One, two, three!

一加二等于三。

Yì jiā èr děngyú sān.

One plus two equals three.

他至少有一千本书。

Tā zhìshǎo yǒu yì qiān běn shū.

He has at least one thousand books.

他讲了一小时。

Tā jiǎngle yì xiǎoshí.

He spoke for one hour.

我们三个一队。

Wǒmen sān gè yí duì.

The three of us are on one team.

我们保证我们的产品一年。

Wǒmen bǎozhèng wǒmen de chǎnpǐn yì nián.

We guarantee our products for one year.

我们要为每个人买一辆车。

Wǒmen yào wèi měige rén mǎi yí liàng chē.

We'll buy one car for each.

我们见面时间安排在一星期后。

Wǒmen jiànmiàn shíjiān ānpái zài yì xīngqī hòu.

Let's arrange to meet in one week's time.

我大他一岁。

Wǒ dà tā yí suì.

I'm one year older than him.

我想待一夜。

Wǒ xiǎng dài yí yè.

I'd like to stay for one night.

我想还待一夜，行不行？

Wǒ xiǎng hái dài yí yè, xíng bùxíng?

I'd like to stay one more night. Is that possible?

我拿了一张半纸。

Wǒ nále yì zhāng bànzhǐ.

I got one and a half sheets of paper.

我用我的旧车换了一辆新的。

Wǒ yòng wǒ de jiù chē huàn le yí liàng xīn de.

I traded in my old car for a new one.

最后一首歌是我为妻子写的一首。

Zuìhòu yì shǒu gē shì wǒ wèi qīzi xiě de yì shǒu.

This last song is one I wrote for my wife.

最大的鹰的翅膀展开长达一米半。

Zuì dà de yīng de chìbǎng zhǎnkāi cháng dá yì mǐ bàn.

The largest eagles have a wingspan of one and a half meters.

让我说一件事情。

Ràng wǒ shuō yí jiàn shìqing.

Let me say one thing.

读书是人生一大快事。

Dúshū shì rénshēng yí dà kuài shì.

Reading is one of life's great pleasures.

除了一人，大家都回家了。

Chúle yì rén, dàjiā dōu huíjiā le.

Except for one person, everybody went home.

非等一年不可。

Fēi děng yì nián bùkě.

It's necessary to wait one year.