You decide to buy two.

你决定买两个。

youdao

Don't forget to buy two ducks, please.

请不要忘记买两只鸭子。

youdao

I'd like to buy two hundred grams of flour to make a pancake.

我想买200克面粉做煎饼。

youdao

It said the government must buy two million dollars' worth of silver each month for that purpose.

VOA: special.2010.06.17

Two dollars means, that the people wouldn't buy tickets. That's what they were afraid of.

两美元说明人们不喜欢,这是他们担心的。

麻省理工公开课 - 电影哲学课程节选

So I just buy what I'm going to eat for like one or two days.

我买点儿够我吃一两天的东西。

在绿色市场 - SpeakingMax英语口语达人

The council also plans to buy two existing travellers' sites at Whaddon and Blackwell.

BBC: Mettle Hill travellers' site meeting postponed

The council still plans to buy two existing travellers' sites at Whaddon and Blackwell.

BBC: Mettle Hill travellers' site: Council withdraws plans

First reaction was to run out and buy two bottles of champagne for a champagne breakfast.

NEWYORKER: Letters to an Editor