From a forecasting perspective, if we know where trade is likely to change, for example, because of the African Growth and Opportunities Act or other policies that encourage trade, we can actually think about which areas are likely to be heavily infected with HIV.
从预测的角度 如果我们知道何处贸易将发生变化 比方说因为非洲增长与机遇法案 或其他鼓励贸易的政策出台 我们可以想见哪些地方将受到艾滋病的侵袭