When humans started draining the natural topsoil, and ploughing it up for planting, they exposed the buried carbon to oxygen.

当人类耗尽自然表层土并开始为了耕种而犁田时，他们就把土壤中掩藏的碳质暴露在了氧气中。

I was shocked by the fact that 150 to 200 thousand hectares of llama grazing land has been ploughed up for quinoa.

150 至 20 万公顷的美洲驼牧场已被开垦用于种植藜麦，这让我感到震惊。

She was too late; for, just before she regained the road, the thing swept past her, thunderous, ploughing up choking clouds of moonlit dust.

她来不及了；因为，就在她重新上路之前，那东西从她身边掠过，发出雷鸣般的声音，掀起月光下令人窒息的尘土云。

It has not been uncommon, I am well assured, for the chief, that is, the first clerk or a factory, to order a peasant to plough up a rich field of poppies, and sow it with rice, or some other grain.

这并不少见，我敢肯定，首领，也就是第一职员或工厂，命令农民耕种一片盛产罂粟的田地，然后播种水稻或其他谷物。