A 3-kilometer-long bridge was built in our hometown three years ago.

三年前我们家乡建了一座三公里长的桥。

youdao

A modern PC typically has a processor running at 3.0ghz (3 billion clock ticks per second), little changed from a PC made three or four years ago.

现在一个电脑的处理器的频率通常是3.0 GHz(每秒30亿次时针摆动)，这与三年或四前年制造的电脑没有太大的变化。

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I have three of them. I had them made in Wuwei during a visit there 3 years ago because I couldn't find any in Beijing.

这样的布袋我有三个，是三年前我在甘肃省武威市游历时请人做的，因为当时在北京我买不到。

youdao

And someone came in there like 3 years ago. I think she's three now,

年前有人来到那家医院。她现在已经3岁了，

与流浪狗的相遇 - SpeakingMax英语口语达人

However, he said analysis of the recently published figures showed the proportion of people getting off drugs after treatment had fallen from 3.5% three years ago to less than 3% now.

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In Louisiana, where Hurricane Katrina struck three years ago, about 3, 000 National Guard members began reporting for duty Thursday, and the state put another 2, 000 on alert and has issued requests for assistance from other states if needed, Gov. Bobby Jindal said.

CNN: Gustav hits Jamaica; Haiti says 51 dead

It improved by 2.42 points per game three years ago, and by 3.22 points per game the following year.

WSJ: The Rise and Rise of the Los Angeles Clippers