虽然它是在以原材料换取进口商品，至少目前这些商品的价格对非洲有利。
Though it is swapping raw materials for imports, at least prices favour Africa at the moment.
铁矿石的现货价格目前在每吨50美元左右波动，虽然高于去年底时每吨36美元的低点，却仍低于每吨120美元的历史高点。
Current spot prices are hovering around $50 a metric ton, up from the low of $36 late last year but still off their highs of $120.
多年前人们就已经在预测，这种技术的应用很快就能全面普及，虽然该预言目前还没有变为现实。但随着价格的下跌，它最终会实现。
People have been predicting for years that they would shortly become ubiquitous; but, with costs continuing to fall, they eventually will.
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