Sanginga notes that about 440 lbs. (200 kg) of nitrogen fertilizer is generally needed to grow five tons (5, 000 kg) of maize, but the average African farmer can afford only 8 lbs. of fertilizer.
桑锦格指出,一般情况下生产五吨(5000kg)玉米大约需要440lbs.(200kg)氮肥,而非洲农民只能担负8lbs.的化肥。
We are thinking about buying 5 tons of groundnuts.
我们正在考虑购买5吨花生。
We're thinking about ordering 5 tons of groundnuts.
我们正在考虑订购5吨花生。
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