复数： tonnes

A 4 00000 - tonne mound sits ready to burn .

一个40万吨的煤堆亟待燃烧。

Prices are still well above their pre-crisis average of $ 250 a tonne .

大米价格仍远远高于金融危机前250美元/吨的平均水平。

Now some facilities cost as much as $ 1000 a tonne .

如今，一些设备成本已高达每公吨1000美元。

However , this week 's auction only managed to sell about two-thirds of the 20000 - tonne planned sale .

然而，本周的拍卖仅售出了2万吨计划销量的三分之二。

A tonne of rice produces around 200kg of husks and those , in turn , yield 40kg of silica .

一吨水稻可以产生约200公斤的稻壳，这些稻壳又可以产生40公斤的硅土。