There was about 300 million tons of grain in the fields at the start of the harvest.

收割伊始田间大约有三亿吨的谷物。

《柯林斯英汉双解大词典》

China came second, with 6 million tons.

中国以600万吨位居第二。

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"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

It contains an million tons of magnesium, 1,000,000 tons, which is more than has ever been produced in one year by all the magnesium plants in the world.

它含有一百万吨镁，一百万吨，那比我们每年世界各地,生产镁的工厂的总产量还要多。

麻省理工公开课 - 固态化学导论课程节选

Aluminum is 25 million tons per year for the whole planet.

铝的产量为每年2500万吨,全世界。

麻省理工公开课 - 固态化学导论课程节选

Last year, oil production in Russia reached 511.3 million tons, or 10.26 million barrels per day.

FORBES: Is Russia Ready For Life After Oil?

Transportation burns up 58% of oil supplies--1.9 billion tons--against 42%--905.6 million tons--three decades ago.

FORBES: Magazine Article

The city produces millions of tons a year (it peaked at 4.9 million tons in 1989).

CNN: Tokyo