"The present canal has a total capacity of about three hundred and forty million tons a year that it can handle, that's the maximum capacity.

VOA: special.2011.08.08

Iron or steel, 800 million tons, almost a billion tons of steel.

铁或钢，每年8亿吨，几乎接近10亿的钢产量。

麻省理工公开课 - 固态化学导论课程节选

But it threatens more than thirty million tons a year of production in East Africa.

VOA: special.2010.06.08

Iron ore production in the three months hit 32.45 million metric tons, up from 29.4 million tons a year earlier.

VOA: standard.2010.01.21

Market experts say next year India is likely to try to import three million tons of rice tapping the world market for the first time in 21 years because of a drought.

VOA: standard.2009.12.17