On the other hand, the recent drop of activity in the developed world and the unwinding of speculative positions have already brought down a number of commodity prices, which may quickly revert the gains into losses.
另一方面，发达国家最近经济活动的下降和投机盘的平仓交易已使一些初级商品价格下跌，这可能会很快使收益逆转为亏损。