The clock is about two and a half minutes slow.

那钟慢两分半左右。

《柯林斯英汉双解大词典》

His friends say he can run a kilometer in just over four and a half minutes.

据他的朋友们说，他能在短短的4分半钟内跑完一公里。

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Eight and a half minutes later she was in orbit, ready to complete her mission of carrying supplies to the space station.

八个半分钟后，她进入了轨道，准备完成她为太空站运送补给的任务。

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Two-and-one-half minutes after the Apollo Eleven launch, the first-stage rocket separated from the spacecraft.

VOA: special.2009.07.15

It's a unique piece because what he does is take some very basic patterns and simply repeats them over and over and over again for about fourteen and a half minutes depending upon the tempo that the conductor is taking the music.

这是件独特的作品,因为他仅仅只是把一些基本的样式,简单地重复重复再重复,大概十四分半钟,当然这也取决于,演奏者的演奏速度

耶鲁公开课 - 聆听音乐课程节选

But the Brazilians came out strongly in the second half and equalized with two goals by player-of-the-tournament Luis Fabiano in the 46th and 74th minutes of the game.

VOA: standard.2009.06.29

Five, or sometimes six, European presidents or prime ministers spoke for two-and-a-half minutes each.

ECONOMIST: European politics

The next goal was vital and, with 10 second-half minutes gone, the home side crafted it.

BBC: SPORT | Football | Championship | Watford 4-1 Sheffield Wednesday

And within two-and-a-half minutes of Bothroyd's third goal in as many games, Cardiff were level.

BBC: Swansea 3-2 Cardiff