This year's trade surplus is partly due to lower prices of energy and commodity products, which used to be China's major imports from Asean countries, he said.
他说，中国今年的对东盟贸易顺差部分缘自于能源和大宗商品价格的下跌，它们通常是中国从东盟进口的主要产品。
It is a different story with commodity exporters who, as a whole, are set to shift from surplus to deficit territory in 2009, given robust spending and much lower revenues.
对那些大宗商品出口国家来说，这又是另外一个故事，作为一个整体，考虑到刚性的支出和减少的收入，他们注定要在2009年从盈余国家转为赤字国家。
The curve for satisfaction degree of commodity exchange has been drawn out with S (surplus volume of exchange) and M( the satisfaction degree of exchange).
文中利用交换剩余S量化交换满意程度M，得到商品交换满意程度曲线。
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