这段的意思有些难以翻译,大家帮帮忙~~~? A heuristic approach is taken to reduce the number of variables so that only the most significant can be quantitatively assessed. Most of the heuristics apply to the distillation columns, where long experience with column design permits the selection of reasonable product specifications that trade off impurity levels with energy costs.查看更多4个回答 . 1人已关注