The largest stones weigh over five tonnes apiece.

最大的石头每块重五吨以上。

《牛津词典》

On a good day a Port Clyde fisherman might catch five tonnes of fish. A big industrial trawler can catch 100 times that each day.

一个克莱德港的渔民在一个天气好的日子里能捕到5吨鱼，一只大的工业捕鱼船每天能抓到这个数量的十倍。

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But five tonnes of secret-police files turned up three years later, stacked from floor to ceiling of a police station in suburban Asuncion, to give the lie to that.

然而3年后，重达5吨的秘密警局档案，其整整装满了asuncion郊区的一个警察局，证明了他说的话是假的。

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The freighter, which was launched on 9 March, is carrying just under five tonnes of supplies for the station's astronauts.

BBC: Total cargo: 4,860kg

This amounts to roughly five tonnes of lime a hectare, sometimes more.

ECONOMIST: Brazilian agriculture

Jules Verne - its generic name is Automated Transfer Vehicle (ATV) - delivered just under five tonnes of supplies to the platform on its maiden voyage.

BBC: Freighter boosts altitude of ISS