Early humans seem to have played a major role in finishing offnine other mammal species that weighed over a tonne.

早期人类似乎扮演了终结者的角色，使其他九种超过一吨的哺乳动物彻底从地球上消失。

The study showed that a single new desktop machine created emissions of almost half a tonne during its manufacture.

该项研究表明，一个新的台式电脑在其生产过程中要产生近半吨的碳排放量。

At 15 euro ($22) a tonne the price is high enough to induce power companies to switch some generation from coal to ga.

每吨15欧元（22美元）的价格足够让电力公司从煤发电转向用气发电。

Even a slender diplodocus, once believed to have tipped the scales at five and a half tonnes when alive, has lost a tonne and a half from its weight.

即使是一个瘦形梁龙，曾经被认为在活着的时候重达5.5吨，现在也减重了1.5吨。

It does not cost much to scrape it up, and the expense comes in moving costs from mine to market. Even so, Australia can produce iron ore for $25 a tonne.

开采成本本身不高，而且外部投资正在将成本从矿山转移到市场。即便如此，澳大利亚可以以每吨25澳元的价格成本生产铁矿石。